During the last a few months, I was having trouble keeping Alexa ranks on all of my domains parked at Sedo. The traffic didn't seem to go away, but the rankings had gone south. Since the beginning of 2007, I started comparing my domains against many others parked at Sedo with traffic. I was surprised that domains that received 6000+ uniques monthly, according to Sedo stats, were not ranked; however, some domains with less than 200 uniques monthly had become movers on Alexa. The only difference I found was that the ones that were ranked were using Retro templates, and the "losers" were with something else. To prove my hypothesis, the parking templates for all domains were changed to Retro Green. In just 2 weeks, I see their ranks moving up again. It may work on the Lite template as well, but I haven't tried. Let me know if it's useful.
And is it having some effect for indexing in the search engines? I have heard that some templates on some parking companies gets indexed nicely in the search engines.
Dude, don't worry about your Alexa stats - they're heavily skewed towards technical users, easily gamed, and have no effect on traffic or search engine rankings.
That's what I told those people who questioned some of my domains. Alexa is indeed for n00bs, but many people like it, and hard to convince them not to.