It depends on what type of blogs you're writing. If you're writing blogs where you're reviewing different products, you might be able to convince the companies that produce the products you review favorably to sponsor you, or they might be willing to pay for the advertising. Reviewing a restaurant or a hotel might get you a comped meal or room, but it's unlikely that you'd earn a living from doing that. Blogging about beauty products or video games is likelier to net you a box of beauty supplies or a new cartridge, not $500. And nobody would be willing to give you anything unless you can prove that your blog is being read by a decent number of people. Getting 14 views isn't worth anything to anyone. And if you're blogging about opinions or information, unless you're capable of demonstrating a particularly insightful point of view as well as impressive compositional abilities, you can forget it. The market is already over-saturated when it comes to that.