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I have received eleven of these emails today, from community@dropboxforum.com:

Due to your contributions in The Dropbox Community, you have earned a new badge!

Two of these went to my spam folder, and after I deleted them from gmail as spam, the rest came into my inbox.

I don't think I  posted anything 12 hours ago or made 10 replies anywhere. Where would I find all the stuff being attributed to me? I can find a question I asked 6 years ago, to which it shows me my own reply that it says I made 8 years ago, and the discussion is locked and I can't see any of the other comments. Also it says I joined the community 3 years ago, but shows my posting was 6 years ago. I can't find any of my other helpful comments. How come Dropbox can find them, and why now? I would wonder if my account was being hacked, but all these stats are so questionable (the "you've posted your first reply" says it was 12 hours ago, but when I click it, I get taken to the 6 year old posting, which shows me one comment but says there were 4) that I think this is a Dropbox issue and not my account.