Just got given 1 million randomly?

Was wondering if anyone here could shed some light on this. Basically what happend was; I tried finding a new session, Got a error message appear while loading, Got kicked offline, then re joined online from story mode, Took a good few minutes to load and it came up with something like "congrats you've been award 1,000,000".

I've never bought shark cards before so literally have no idea why I was given this. Pretty swell but still would like to know why, if anyone has a theory, thanks.