If I want to increase the price of a monthly recurring upgrade, I should disable the current recurring user upgrade and make a new one. Any users on the old subscription will continue to auto-renew at the old rate (for infinity?) and will not be demoted out of their premium secondary usergroup, correct?
Alternatively, what would happen if I simply delete the old recurring upgrade? Would users get errors in their paypal account, or would their payment subscription auto stop, or will their money still come to us and have to be refunded?