Not sure if this is the best category for this post, but I couldn't locate a more relevant one. When it comes to in-text ads, like Kontera, which service out there is the best, in relation to earnings, in people's opinions or experience?
I assume you're just asking about in-line contextual ads, so TLA does not count. Intellitxt is the best from what I hear, but like Jason Green said, they're hard to get into. You've really got to have a lot of good traffic and be able to prove it.
I was accepted into both Kontera and Intellitext (Vibrant Media). I must say I am more please with Kontera for a few reasons... They have a very responsive support staff... and they were more willing to work with us on a better payout to keep as a publisher. Intellitext took weeks to get back to us... and their payouts were mediocre at best. Might be because we are a mid-sized publisher and not a big fish... so Kontera appreciated our business more.
Kontera support sometimes took us 1-2 weeks to get a reply for adding new sites etc, but now you can add new sites in flash...via their control panel (generate code).