The problem is that they’re likely to get new users from their sale of data to Google. That’s constantly pushing new people to reddit. And if those people didn’t leave during the protest or because of the influx of bots, they’re not likely to leave en masse over this.
My guess is that reddits death will be very slow.
I left during the protests when it became clear that they weren’t going to change their mind about shutting down third party apps. I still miss some of the communities there, and I’m a little bitter myself over the whole thing. But to me it’s better to continue to protest by not going back.