Take a look in your spam box, I did and found an email from Facebook offering me a $50 Facebook advertising coupon. I am not sure why Gmail marked it as spam, but I am positive it’s a legitimate email.
I went through the process of creating an advert, but couldn’t find out where to enter the coupon code, and I wasn’t too sure if you had to pay to be able to get the $50 coupon like you have to do with the $75 Google Adwords vouchers you always see. I was just directed to pay via PayPal and credit card, but I didn’t want to pay because I didn’t really need the ad.
Nevertheless, if it’s a free $50 advertisement with no strings attached, then well done Facebook.