(1) We are going to incentivise high quality decks by allowing people to sell access to their decks

(2) The main problem we see with Anki public decks is that the user themselves decides whether they got the question "right" or not when reviewing the cards. This lack of a "teacher" means that it is very very difficult to learn using someone else's cards.

You basically end up kind of getting something wrong but then saying it was right anyway. Do that a few times and your trust & investment in the process goes and you'll eventually you lose motivation to carry on with the deck.

Save All decks are different. WE decide whether you got it right or not, not you. This makes it much easier for you to learn using someone else's decks