one time, on another website, I really wanted to be a premium user (To get more of the benifits)

well one day I logged in to find that someone on the site (I don't know who), had gifted me $75 worth of membership (3 years)

I posted to attempt to find out who it was, but never did

I never told anyone, so my guess is that someone just thought they would be kind to less priviladged users