FindRichGuys is "100% free full access."
Probably FindRichGuys is the simplest among the top 10. You can see its simplicity from the homepage. Also the homepage is full of ads. The site looks like an unfinished draft.
FindRichGuys has a low Alexa traffic ranking, which means there are limited traffic daily.
Inside FindRichGuys the site is simply designed.
(* No user testimonial can be found and retrieved on the site.)