It seems that a lot of the outrage when it comes to businesses changing their policies stems from the fact that these customers seem to feel as though they have been betrayed. Instagram is certainly the best recent example, but it happens often. People sign up to these services and then they act as though this company has made them a promise that they'll never be mean to them or make them confused.
Personally I seriously feel as though we need to get to grips with the fact that when you're not paying for something, these people owe you nothing. Even when you are paying for stuff, did you read what that actually entitles you to? For example, let's say you bought a video game, in reality 99% of the time all that you've done is purchase a right to play the content these people have created. It's time to recognise that we don't own everything, and a lot of things in this world are pretty damn transient.
In risk of repeating myself, I'll wrap this up now. I'm writing this on a Squarespace website at the moment, and I have no illusions that everything will remain the same. I've paid a decent amount of money for my account, but I know that doesn't mean I get to decide what Squarespace does in the future. I'm realistic about it, and I'm not the only one who is, but there are too many people who aren't and it's getting more and more out of hand.