Anecdote: OkCupid is the only website or app where I've had an account hijacked. I got it back with a password reset, but the profile and pics were filled with bogus content.
I had the same experience. My profile was transformed into a 50-year-old white male wearing a trucker hat without my knowledge. By the time I was able to access my account, it had a bunch of matches and messages from 50-60 year-old American women.
So how'd your dates go?
That's what I would say too ;)
Any idea what the intent was?
Not the person you're replying to, but: probably to use the account to romance-scam other users with.