roAppInfo.getOrderDate() as roDateTime 'returns timestamp of when the app was added to this user account for the first time
'(regardless on which device, regardless if free or paid)
2 - use getpurchases() to see what products the user has purchased within your channel and if product A or B exists, then bypass ads
I went down a similar route, too. I thought I could add a Product A & B and just "purchase" Product A for existing users for $0.00, but there's no "Price tier 0".