yes i have, banners from sadsence,and other, almost 80% of all the banners i placed in my site sin the past 4 yrs, have payed up. but there are many scam sites out there too, so better be careful :lol:
Only banners representing a reputed leader in the concern industry can give you some money.
Place is a vital facor for banners and always choose banners from the comnpany which have some sort of similarity to the context of your website. And always choose banner keeping in mind the audience groups of your website.
I mean if you has a sports related website you better can place health, food suppliment banner instead of earn money online banner.