I got a coinbase transaction and I don't know where it comes from I received a small payment from a coinbase transaction, but I haven't been mining nor I have signed up on a mining pool. Does this happen when someone accidentally sets my address instead of theirs when they mine? I think the probability for that to happen is pretty low.
Interestingly, it was a withdrawal from earn.com I made a few months ago which I forgot about. Wondering if they mine on their own.