I got Free AP doing the Facebook, myspace thingies. I also got 500 AP from being a part of the EU group
just last week.
Those site are legit however, once you have entered in contact details, you effectively give them permission to contact you with promos and offers. Some companies like Netflick, hire third party solicited to gather infomation. Once you give the info to third party site. They are allowed to sell your info to other companies. Last i was told, your email is worth $.10 and $.50 for phone number. Imagine how much money they could make selling information.
If I was smart enough to be a third party, I rake in the dough.