I thought the whole point of Entrecard was a FREE ad network for bloggers. I approved a few paid ads to be displayed on my site and you know what I found out? That when you approve a paid ad, it doesn't get in line like the rest of the ads, it jumps right to the top, overwriting any currently running [free] ad. I for one, do not like that at all.
I will go in an select not to accept paid ads (if that is possible, which I think it is) and from now on I am only approving the regular ads that I have all along. I've noticed I haven't had any regular EC credit ads, only paid. I for one, can't afford to use paid advertising. Correction, I do, but it is on a popular sewing blog and well worth it. I enjoy being able to purchase advertising with my EC credits.
I will not be approving any paid ads. I've already approved quite a few, and my whole page is full plus full of ads requesting time. I understand this not being a team player, but I already spent way too much time dropping and if this turns out to be a "chore", I'd just as soon quite the whole show.
I hope you understand and will still advertise with your earned credits.