Hmmm...so help me understand something. As a publisher, if I'm using in-text advertising, I'm going to want to: a) increase my revenue, while b) keeping the links relevant. In the case of a), I'm assuming that more links on more keywords is better (at least up to a point), whereas for b) I'm guessing that advertisers on Kontera probably want to link relevant keywords. Apple doesn't want links for a sports team, even if it gets them traffic, because it's not relevant and won't convert. So I'm assuming that Kontera's relevancy issue would be self-correcting to some extent, in which case I'd actually prefer a broader array of options, rather than focusing on one data set. I guess I don't understand how this is better for anyone, unless Kontera really gives you zero control over what can / can't be linked, how many links there will be on the page, etc.
Regardless, this all sidesteps the primary issue IMO, which is that in-text advertising sucks.