Mile is delivering measurable incremental yield across The Arena Group's top revenue properties — and the trajectory is accelerating.

What's working on Arena

Mile's contribution is consistent, measurable, and improving over time. Four wins from the last fifteen days illustrate where the partnership is generating value today.

Mile bidder's share of total programmatic revenue, by property. autoblog.com represents the mature state of the partnership — what the rest of the portfolio is moving toward.

Mile performance across The Arena Group's top 7 properties

Seven properties account for 90% of The Arena Group's programmatic revenue. Mile is active on all seven — and outprices the peer average on every single one. The range of outcomes across domains tells a clear story: autoblog.com is the mature state, mensjournal.com is the fastest path to replicating it, and the May 15 update delivered meaningful gains across the tail.

Mile's average CPM vs the peer bidder average on the same inventory. Mile clears above the peer average on every property — the premium reflects Mile's optimization layer improving yield on each impression Mile wins.

Reading the domain spread

autoblog.com is the ceiling. At +37% above peer average CPM, 19% revenue share, and #1 rank across every metric, autoblog represents what the partnership looks like when Mile's algorithms have had time to optimize on a property. Win rate here is 6.1% — the highest of any domain — meaning Mile is not just pricing higher but winning more often too.

mensjournal.com is the next autoblog. Mile is already #2 by revenue on mensjournal — the only other domain outside autoblog where Mile has broken into the top two. Bid rate is the highest of any property at 36.2%, and CPM is competitive. The gap to close is share: 9.9% now versus autoblog's 19%. The optimization levers are working; this domain needs more volume.

Mile's revenue share and CPM before and after the May 15 algorithm update, by property. Share gains and CPM lifts are broad-based — six of seven properties improved on at least one dimension.

Where the May 15 update hit hardest

paradepets.com: +25% CPM lift (from $2.73 to $3.41) with share up +3.3pp. Paradepets was Mile's weakest property pre-update; the May 15 retrain appears to have found pricing signals that weren't being captured. Worth watching whether this holds over the next reporting window.

trending.thespun.com: +4.7pp share gain — the largest share increase of any property. CPM moved modestly (+1%), meaning the gain was driven by increased bid density rather than pricing. Mile is now at 15.5% share on thespun, up from 10.8%.

athlonsports.com: +14% CPM lift from a low base ($2.88 → $3.29). Share up +1.3pp. athlonsports has the lowest bid rate of any domain (22.2%) — there is likely additional request volume Mile can participate in that it currently doesn't.

autoblog.com: share dipped -1.1pp despite a +4% CPM improvement. This is consistent with a publisher-side traffic pattern on autoblog rather than an optimization regression — Mile's per-impression metrics improved while total domain volume contracted.

How we know Mile is adding yield that wasn't there before

Mile's commitment to Arena was incrementality — measurable lift in programmatic yield from the same demand partners, delivered through a managed server-side optimization layer. Three independent signals in the data validate that this is happening.

1. Same partner, higher prices through Mile

For every demand partner currently live on Mile's server-side path on Arena (with a comparable client-side adapter for direct comparison), the partner's average CPM through Mile is higher than the same partner's CPM through their direct client-side adapter — on the same property, the same time window, the same inventory. The premium isn't marginal: it ranges from +1.3% (sovrn, where Mile is still building scale) to +23.6% (triplelift) with a revenue-weighted average of +19%.

This is the cleanest evidence Mile's optimization adds value rather than substituting for client-side fill. The same buyer, bidding on the same impression, pays more when Mile mediates the auction.

Average CPM for the same demand partner through Mile's server-side path vs. that partner's own client-side seat. Identical inventory, different optimization layer.

2. A trajectory of compounding gains

The day-over-day trend tells the most important story. May 4–9 establishes a steady ~10% baseline. Starting May 10–11, Mile's share begins climbing — May 14 hits 11.5%. The May 15 algorithm update then accelerates the curve: May 15 reaches 12.7%, May 16 holds 12.0%, May 17 sustains at 11.7%. The shape of the curve matters more than any single day's number — Mile's contribution is on an upward trajectory, with optimization cycles compounding rather than producing one-time spikes.

Mile's day-over-day share of total bidder revenue across Arena's top 7 properties. Baseline phase, build-up phase, and accelerated phase shown by point color. May 18 is partial-day data.

3. Compounding optimization across the portfolio

The May 15 algorithm update — a model retrain and floor optimization on Mile's side — lifted Mile's revenue share broadly across the portfolio in three days. Six of seven top properties improved, with no single property disproportionately driving the result. This is what continuous optimization looks like in production: the algorithms learn, the yield compounds, and Arena sees the result in the daily data.

Mile's revenue share across three phases of the reporting window. The May 10–14 build-up reflects ongoing optimization gains; May 15–17 shows the acceleration after the most recent algorithm deploy.

Underlying metric movement: Mile's CPM and bid density (Request RPM) on each top property, comparing the baseline period to the accelerated phase.

Demand partners on Mile's server-side container

Mile's server-side container currently routes ten demand partners with measurable revenue contribution on The Arena Group's top properties over the 15-day reporting window. Two more are configured but not yet transacting.

What's next on Mile's side

Mile's optimization investment on The Arena Group continues in two parallel tracks: ramping the partner roster to its full configured state, and continuing the algorithm improvements that drove the May 15 acceleration.

Partner roster completion

IX and Criteo activation is the most consequential near-term action — both are configured on Mile's side and waiting on partner activation of Mile's Prebid Server endpoint. Beyond those two, Mile is actively evaluating Arena traffic to identify additional demand sources to add server-side, both as new partners and as share expansion for partners currently routing only a fraction of their volume through Mile.

Continued algorithm investment

The May 15 deploy is one step in an ongoing optimization cycle. Mile's team has additional improvements in the pipeline — model retraining on the expanded data corpus, floor model refinement on the lower-revenue properties where Mile's share is still below portfolio average, and bid enrichment work that compounds on top of May 15 gains. The next deploy is targeted for early June.

Measurement and reporting cadence

Mile will continue producing this performance report on a biweekly cadence. Any algorithm change deployed in the next window will be measured against the May 15–17 baseline so the incremental contribution remains unambiguous. If The Arena Group would benefit from an alternative cadence or a specific metric in the report, let us know.