Keeping the lights on is fine.
But if they remove a feature I rely on, I can't put it back.
If they add a feature I hate, I can't remove it.
If they jack the price up, I have no real solution to this.
If they move features I rely on from the standard tier to the 5x more expensive pro tier, I have no real solution to this.
Why, yes, this is an echo of the old argument for open source software.