It's not on the pricing page (I was surprised too) - I think maybe GP means that it's rolling monthly, and that they no longer do card subscriptions (on a pro-p

It's not on the pricing page (I was surprised too) - I think maybe GP means that it's rolling monthly, and that they no longer do card subscriptions (on a pro-privacy stance, not wanting to store them, Know their Customer, etc.) so you can pay (say, Amazon) for the time (1 month, 94 months, however many months) you need.