http://www.pornking.biz/topbucks223.jpg
that is from yesterday - the new one works just fine for me
I wouldn't have any problem signing up for their exit program, but because I do a little over 1:600 on exit with them - I will stick with the $40 per signup. Maybe you should try the topcash one first - and then go with topbucks if your conversions are good enough.
As far as what kind of traffic - I send mostly free site and search engine traffic.