If you refer someone and they get the role but they do not perform well: Are there any negative consequences on the person who refers them?
At a small startup where you refer someone directly to the Team Lead maybe that will cause them to lose trust in you for future referrals. Is that the same case at Meta or FAANG? Do they keep track of people you refer and how they perform?
Referral quality is generally tracked, yes. However, if they made it all the way past the interview, I feel like that's more of a reflection on the interviewers, not the person referring folks in.
I think it reflects badly if the referred-in candidate completely and utterly bombs the interview, like 100% falling apart at the phone screen stage. And of course, if the referral is rude during the interview, that will reflect very poorly on the referring employee as a poor judge of character.
For folks reading who are looking to get more referrals, I recommend this: "How to get referrals?"
If your referral cheats on the interview or they're extremely rude, it will reflect poorly on you.
If they don't perform well in the interview, it won't. People fail interviews all the time -- they may have gotten unlucky with a difficult question, or they just had a bad day. The decision to interview the candidate was made by the recruiter + hiring manager, so it's not your fault if the candidate fails.