[asdf99]

also being an volume ad middle man in the industry, I can bet what the top comment was referring was price.

adx is the cheapest, because it's the worse. your ad will be seen by users in spots previously occupied by "the banks hate this guy" kind of click bait ads. which have ridiculous ctr!

everyone I run experiments there I keep getting calls from clients to take their ads out of some and some sites before brand sees it. it's a nightmare.

[sprw121]

No, not price, although they are pretty cheap and run a fair auction system (unlikely other exchanges...looking at you facebook/appnexus). The CTR on adx is actually one of the better ones, and they tend to have less junk inventory.