People on Facebook won’t pay for anything. They don’t have credit cards, they don’t want credit cards, and they are not interested in shopping. But you can trick them into doing one of three things:
[scams 1 and 2 deleted for space]
Give up their phone number: You took the IQ Quiz, so give us your phone number and we’ll tell you your score. Never mind that you’ll get billed $20 a month or perhaps be tricked into inviting 10 other friends to beat your score.
Last week, Tech Crunch managed to call some attention to these sorts of scams being run on free-to-play item-store games on Facebook. Players thought they were taking some survey in exchange for item shop currency on Farmville or Mafia Wars, and wound up with massive cell phone bills. Everyone responsible is very sorry that they got caught, which means that we're nigh certain to hear about something similar in a few months.
The lesson in this tale is that, if you are using a professional quality product, whether it's a game or anything else, and you are not paying for it, someone else is.
Many players, myself included, will grudgingly say that we're okay with microtransactions as long as those transactions are limited to cosmetic items. The problem with this approach is that it's effectively a vote for "if you guys really feel that you need more money, you should charge someone else". You'd think that everyone would have largely the same opinion, but it turns out that there is a group that's happy to be charged more, if it means that they can get a greater variety of high quality cosmetic items.
Should we really be surprised that games that add item stores end up adding more and more items that get closer and closer to the nebulous line of having "too much" effect on gameplay?