I very much would like to use them, but the high-traffic domain I was going to transfer to Above almost sold on a marketplace last week. If only I had remembered that the marketplaces can do a decent job providing a decent "earning per one click" when they present a respectable offer on the table from a buyer. Counteroffering didn't work, but I'm still hoping that perhaps the buyer will change his or her mind.
This year has been exciting to at least have Bodis have income that for one domain at least easily paid for its renewal--and that was with a fairly short time doing the parking. Since sales seem to be down for at least some folks, your continued postings about the ad-parking are all the more relevant. At least if the domain isn't sold, if it still pays for itself, that's a start.