Is pay per Tweet the new wave of advertising?

For small businesses (many of whom are our customers), traditional modes of advertising can be too expensive. You've already heard of banner ads where you pay per click. But as pay per click rates skyrocket, will we see companies paying per tweet?

Entrepreneur.com seems to think so. According to the article, TweetROI is one of a small but growing group of emerging platforms that leverage Twitter as a low-cost medium for companies to place ads that reach very specific targets. A business buys into the service and offers a cash incentive to those who tweet its ads. Each platform has unique features and benefits, so it's up to entrepreneurs to decide which suits their business best.

But we want to know what this is going to do to the integrity of tweets. Will this lead to tweet regulation?