TLA is expensive. Better to find better deals at link sale forum. But to sell links, TLA isn't too bad
If you can find a nice site to advertise on via TLA then go for it. The only problem is that TLA might sell some crappy loans or mortgage links next to yours but thats the risk you take.
I am using them ONLY to get revenue (just started anyway). I don't buy links. I'd rather use free promotion ways since I cannot afford paying
On the publisher side, it's a definite thumbs up. But even when you raise prices, there tends to be a slow down in link purchases. IMO, even $200 a month is cheap if you get a link in a prime position on a high traffic site. And the lock in rate features sucks too.
Well, I once paid $40 for a pr7 animated gifs site with an alexa of about 19,000, and the owner claimed he had average 14,000 uniques per day, which is believable. Out of those, my itty bitty anchored text link brought me about 2-3 uniques per day. Not so great. But of course, if I left that link for 2-3 months, it would be most likely very beneficial to my serps for that phrase.