One can only hope there'll be a watershed moment like the one that killed Digg. So far, reddit has been very careful raising the temperature so as to not scare the frog before it's dead.
That way you don't give the data freely, you could make each API keys provided to the user with limits that won't impact normal navigation but would cripple automated data capture, and you'd solve the issue where third-party apps aren't fed ads by sustaining the platform through subscription.
So they are just alienating younger users.