I'm not sure how much you currently legally own imitations of your own voice. There's a whole market for voice actors who can imitate particular famous voices.
When those imitations are commercialized, there is a disclaimer that a celebrity voice is being impersonated, and parody is a legally protected form of speech. OpenAI is not parodying anything, and failed even the low bar of having a disclaimer.
Not exactly, it's tough because every high school needs a different normalization, and it may drift from cohort to cohort. Most universities only ever see a handful of students from any given HS, so it's really tough to untangle the big spike of 5.0 students. Usually the results are weakly predictive of academic success, if the correlation even exists at all. External agencies like the CollegeBoard offer data as a service type solutions for this, but they're (A) low quality, (B) expensive, and (C) have lots of weird privacy concerns because it's data about minors.
People who take the SAT are self-selecting. An awful lot of kids don't take it, and a lot of schools don't require it. So the sort of kid who takes it will also be the sort of kid who gets good grades.