I've got an email from person who asked to place his link and 1 short text at the end of one of my articles on my site which has no pr no nothing and paid me $100+ for it, said for a year.. Is there a trick in it? Could he do something with it? I've placed everything myself and the links is some college in chicago, I'm just not sure why would anyone do that? Any thoughts? Could there be something behind it? Share your thoughts please.