Some groups I have joined post up links every now and then and more and more are doing this. The links have 'LinkBucks' in it. It made me wonder why would they do this. So I went to LinkBucks.com and found out if you give a link and people click on it you make money so if you have a group with hundreds and thousands of people your going to get a lot of money if you post a link.
What did I do when I found out? I 'unliked' the group they may have lost 1 fan and don't care but hopefully more will follow.