Is this base salary? What is your profile? 10 years of exp. at FB? Individual Contributor? Are you specialized in AI or something else?
Would you mind explaining what this is? You've mentioned that twice in this thread and it's something I've never heard before.
I think you're supposed to use it to refer to people who are evaluated by their own work output as opposed to measuring the output of a team (even though I think for senior engineers it's totally valid to evaluate whether they're boosting the team and nudging them towards better solutions).