Sticky formats ranked by yield-per-pixel

Sticky formats ranked by yield-per-pixel
Not all sticky ads are equal. Yield per layout-cost varies wildly.

— Anchor (bottom, 320x50→adhesive) $/1k sessions $3.80 ▮▮▮▮▮▮▮▮▮
— Sticky sidebar (desktop) $2.60 ▮▮▮▮▮▮
— Sticky sidebar (in-content rail) $2.10 ▮▮▮▮▮
— Vignette/interstitial $1.90 ▮▮▮▮ (but bounce risk)
— Parallax $1.10 ▮▮

n=85 sites, 28d. Bottom anchor wins on viewability (always in-view) and tolerable UX. Vignette earns but taxes pageviews/session ~6%.

So what: anchor first, sidebar second; meter vignettes by frequency cap (1 per 3 pages). Anchor vs parallax: yield ▲ +245%