NZBGeek was the one that got hacked, they placed a keylogger in the site. It should be fine though as long as you use a different password than other sites and use crypto for payment. The only thing that the hackers would get if you do this is the email, they could spam or phish you, but that is it.

I never use a credit card or debit card in indexers, I only use it with usenet providers.

https://redlib.catsarch.com/r/homelab/comments/klc3cw/psa_if_you_use_nzb_geek/