I have two concerns about a website that pays affiliates for social media votes:

1. Skewing page one content or, in the case of Stumbleupon, pages delivered. They are turning a social media site, which is supposed to be social and democratic in nature, into pages full of advertisements. Stumbleupon already allows some of this for the members who choose to be "sponsors". Every 5th or 6th Stumble is a sponsored stumble. They do have guidelines as to what kind of page you can display. The website that pays its members to vote has no guidelines, only customers.

2. Burying good content. Who is to say that this website can't send an email to it's armies instructing them bury a post? Imaging one of the top Diggers submitting a great post, getting enough votes, and expecting the post to make page one of Digg only to find it buried like a piece of garbage. Oh, but they would never do that, right?