Let's hope that other people see it differently and have a more empathic response. I get what you are trying to communicate but realize that this was done without their control and in a way that instantly destroyed their business as it was. If you pile on and ask for a refund then you are making things much worse for them, and you did get value out of it in the past. The 'promised value' has been delivered, your beef is with Twitter, not with the developers.

Assumptions about their bank balance and 'that's business' are the wrong way to approach this.