My initial experience as a publisher was not so smooth. Let's put it this way. Their price per thousand impressions was very low. I don't know if I was just testing them with small sites, or if that's what they actually pay. I know each campaign is handled by your manager, they negotiate rates for each campaign IIRC (haven't used them in years), so maybe if I showed them more traffic, they would give me a better deal. After a few emails back and forth, they stopped responding and I couldn't get other sites approved, so I just stopped posting their ads and moved on.