Close the mobile-vs-desktop RPM gap

Close the mobile-vs-desktop RPM gap
Mobile RPM runs 35-50% below desktop on most content sites (n=95, 28d), but half that gap is fixable layout, not demand.

RPM by device (indexed to desktop)
Desktop ▮▮▮▮▮▮▮▮▮▮ 100
Tablet ▮▮▮▮▮▮▮ 72
Mobile ▮▮▮▮▮▮ 58

— Step 1: Add a mobile sticky anchor (often +15% mobile RPM alone).
— Step 2: Use a properly-capped mobile interstitial.
— Step 3: Match in-content unit count to mobile reading length.
— Step 4: Kill desktop-only 728x90 leaderboards on mobile.
— Step 5: Re-check mobile viewability — it should beat desktop.

So what: Anchor + interstitial closes the gap by ▲ 18%.