I can't find any recent discussions about allowing or blocking these 3rd party networks. I've tried them on and off a few times last winter but I'm still not sure.
My CTR and CPC are actually pretty good right now with all of them blocked, and I'm getting pretty high ad relevance finally. But I wonder if I could be earning a bit more if they were allowed. It didn't seem to be the case last time, in fact I think I saw a decline in income with it on. Looked more like 3rd party ads just displaced and diluted my high CPC clicks.
From past experience I know those network CPM ads are generally really poorly targeted and I always have to review my site and keep re-blocking bad networks but does anyone think it really increases adsense bidding enough to use it?
What kind of percentages is it worth for those who do allow them?