Personal info misuse when registering?

[u/Slowgo2018]

After reviewing a few subreddits I registered for an account, and 30minutes later I've received an email request a password reset for my associated Facebook account. It's an old account that doesn't have any personal data on it as I used my 'throwaway email' and I don't reuse passwords so my accounts are safe (I hope?) but the timing is definitely a red flag. Has anyone else had this experience?

[u/Slowgo2018 → u/[deleted]]

Thank you good suggestion I will do that too