Asking readers to ‘Pay with a Tweet’ seems simple, right? You get a tweet about your product; they get the product for free. Trouble is, it’s not that simple. The free product isn’t “free” if you’re asking for something in return – even if it’s just a tweet. And it’s not “just” a tweet. You’re asking your readers to promote and endorse your product to their followers – without letting them go through it. You’re …