I suspect still ST3 still being in Beta is a service to ST2 users, who paid it but for a relatively short time before first st3 betas and whose license key will

I suspect still ST3 still being in Beta is a service to ST2 users, who paid it but for a relatively short time before first st3 betas and whose license key will be valid with ST3 betas and not ST3 once out. Not that I am in this case at all.