One of the cleverest ways I have seen to promote word-of-mouth marketing, Pay With A Tweet will let people buy your products using tweets instead of money. That is, people will pledge to mention your product in exchange for having a free copy of it.
That might not seem like such a big deal for you (IE, the one who has developed and published the product to begin with), but if you think about it a single tweet can prove pivotal in making or breaking any product. A single tweet. Now imagine if you will the effect that having a group of people tweeting out about your product can have, specially if we are talking about positive feedback.
If this sound like the service that could let you market any product of yours more satisfactorily, you can get started very easily – a “pay with a tweet button” can be created in just a couple of clicks and keystrokes.
PayWithATweet.com In Their Own Words
“In today’s world the value of people talking about your product is sometimes higher than the money you would get for it. ‘Pay with a Tweet’ is the first social payment system, where people pay with the value of their social network.
It’s simple, every time somebody pays with a tweet, he or she tells all their friends about the product. Boom.”
Why PayWithATweet.com It Might Be A Killer
The importance that Twitter can have when promoting anything shouldn’t ever be overlooked. This site capitalizes on such a truth.
Some Questions About PayWithATweet.com
How can this service be further developed? 
