Supporter is staying (as all previous upgrade). You won't see supporter upgrade due the fact that you already have it (users who have certain upgrades won't see them by default). You have to click at "All" on the right side ( " Available All " radio buttons) to see it. Upgrade page, once it's done will display "Onyx" "Power" "Power+" "Supporter" and "investor" with all benefits. When a user is browsing that page, and he or she has certain upgrade, that upgrade won't be visible to him / her (unless he / she clicks on "all" radio button).