HilltopAds offers popunder, push, in-page and display through a self-serve platform with an emphasis on direct, non-mainstream supply and anti-adblock inventory. It markets on competitive pricing and fast approvals, which suits affiliates running high-volume direct-response campaigns.

Like most second-tier networks, the upside depends on disciplined geo and source targeting; left broad it drifts. Kept tight, it's a cost-effective complement to the display-led majors.