Just had "43 free gems" pop up when I logged in on facebook (but not on mobile). It did ask for credit card/paypal, but showed a "total charged: $0.00" and there was no transaction on paypal (which I used). See if you have the same.

Hello, Did you manage to get any screenshots of this? I don´t think it is Social Point.

@BEX101 It is a Facebook promotion