A couple of weeks ago, there was a bitcoin scam happening on twitter. Scammers were hijacking the twitter account of celebrities and various people claiming they were giving away free money. All you had to do was submit a small payment to verify who you are and of course, it was a scam.
Now this scam is back in different forms on Facebook. One example is an ad on Facebook looking like it is from CNBC promoting an investment opportunity in a new crypto-currency. All you have to do is submit our credit card information in order to invest. Of course there is no new crypto-currency. Beware of these ads and similar ones. It all goes back to that expression that if something is to good to be true, then it probably is.