Yes. Except for okcupid. They pleaded with me via an ad of theirs (which was locally so it wasn't flagged by adblock) telling me that they rely on ads for income. They also said that I coud just pay 5 or 10$ and pay for my use for life. Which was a pretty cool thing to do :)
Ads should be quality checked by the site's owners. A crappy ad can turn away a visitor. At least I don't run the risk of that.
Ads should be quality checked by the site's owners. A crappy ad can turn away a visitor. At least I don't run the risk of that.