Considering going Premium

So after rediscovering that RomUlation has a LOT of games I want to collect, I considered upgrading to premium.
My question is how soon would my account become premium status? Would admins/mods have to activate it or is it automated? I only ask because I somehow feel that if I upgrade to premium it would take longer to activate than expected.Thanks.

With PayPal it's instant. With Bitcoin it requires the payment to be confirmed so the time can be anything from 15 minutes to 4 hours.