TLA is huge for my travel site - (much bigger than anyone has posted here) - it's generally on par with my adsense earnings, and a lot more predictable. They're super-responsive to all questions, lots of great advertisers... The only catch with them is that they tend to under-value high-PR pages (4 or 5), and once an advertiser buys a link on a page, they have that link at that price forever. It is not possible to re-price. My travel site is Alexa 150k and accepted pages vary from PR2 to PR5. Haven't tried them on my travel blog yet though, and the affiliate deal hasn't produced a penny yet... No effect on PR as far as I can see. http://www.ianandwendy.com
one of my site accepted into TLA but i never tried TLA, r u sure my pr will be down by using TLA thx GOD my ac is save. i will try TLA, coz all of u r saying we r not earning good money.