How often do new surveys appear? I've done every survey available and have only 2100 points. I don't mind doing the surveys, as they are pretty quick for the most part.

I was trying to compare this to the AOL/AAdvantage surveys that gave 150 miles/survey. That was somewhat more generous for one's time, but you could only take 1 survey every two weeks, and often when you tried, you wouldn't qualify. At least here, everyone qualifies.