Narwhal said they are going to continue and start going subscription only once Narwhal 2 is released. Apparently they worked out some kind of delay on billing.
That was my understanding, also. I read that the first billing for devs would be sent on Aug 1, so developers who did not want to pay shut their apps down on June 30 so they wouldn't have even one bill for API use. However, it also sounds like Reddit shut off the API early from what Christian Selig said so they continued their petty games.