"...Well, that's the real problem, isn't it? If users aren't punishing Facebook by leaving the platform in droves, then what incentive does Facebook have to stop its consistently user-hostile business practices?..."
And the reason they're not leaving and don't want to leave? Where else are you going to connect up with old friends and remote family members?
I said it when Facebook started growing like gangbusters. Facebook is the frickin' devil. It uses your friends and family against you. For a free service, it sure costs like hell.