Pay per tweet will never really take off just like pay per post never really took off. The main reason it people listen to two main sources of recommendations:

Pay per tweet will never really take off just like pay per post never really took off. The main reason it people listen to two main sources of recommendations: figures in authority and their friends. Pay per tweet doesn't really pay enough to give people an incentive to bug their friends, and it certainly doesn't pay enough for celebrities to so obviously tarnish their credibility. 140 characters isn't exactly enough to be subtle. And, finally one thing pay per tweet doesn't have that even pay per post had is the ability to buy page rank. All in all I can't see it taking off, because advertisers aren't going to pay the masses to scream into the void if they don't generate legitimate leads. Unlike other forms of advertising, online advertising is easy to track and only innovation that genuinely works sticks.