I don't think you should worry about Alexa Rank. If you want to make money with TLA, it's about PR, Niche and VOLUME. (Mostly that last one).Im pointing no fingers.
Does Alexa rank play a big part on their system? I hate that ranking system.
Oh yes. I know someone who purchased a bunch of PR5 links for a year at $500 a go.Little hint for you. Travel is the niche you want to be in selling Text Links.