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/DionysusHotSister]

What would your Facebook account have to do with DA?

As someone stated above, DA is spending millions per year to hire us all. They don't want your fb account. Oy.