I think reddit will eventually shrug it off. There's an enormous number of users who think their app is perfectly fine and claim to not even notice the ad spam. Whether they're blind or braindead is another question and I don't get it, but most people don't care.

The ones who do care are the ones who still know old.reddit and make the platform worthwhile with their expertise. As those people migrate elsewhere reddit will become even more mediocre and irrelevant.

Reddit will survive, just like Twitter and yahoo are still alive. But eventually nobody will even notice that it's still alive.