This type of thing happens a lot, if you're a user with a little bit of a reputation, regardless where you're at, then you'll likely see this. I've had business accounts which were particularly valuable in the past on other websites, and they literally non stop, every day, sometimes all day get password resets.

It's why some websites only allow a certain amount of requests, but that might then mean the legitimate user not being able to do it, because others have done it before them, and continue to do so.

These are usually very low, speculative malicious users though. So, can usually be safely ignored. As long as you have your credentials, and accounts secured, and ideally some sort of two factor authentication. You should be alright.