A few apps that have a smaller amount of users have been granted a delay in which they can set up a subscription scheme.
We don't know yet what the subscription cost is going to be and whether the whole thing will be sustainable. It's not clear to me for example what will happen if the users/traffic for these apps eventually rises (which is bound to happen if they're the only ones left standing). Or why a deal couldn't be reached with the large apps too.
Not to mention the whole sour taste, a couple months ago if Reddit had come out and said "we're putting all 'power user' stuff behind a paywall, pay a sub directly to us to help us out" I would've seriously considered it. Now, not so much.