I wish they would just rip the bandaid to stop everybody's entitled whining.
"We're sorry, what we were able to give you for $100/mo before now needs to be $200/mo (or more). We miscalculated/we were too generous/gave too much away for too little. It's a new technology, we are seeing a ton of demand, we are trying to run a business, hope you understand. If you don't want it, don't pay for it."
Just put everyone on pay per use with the API and rip the band aid off.
Are we at the point where there are external constraints that cash can't solve?
It is one thing to pay 100 a month to make calendar apps for your linkedin and birds on bicycles to get invited to talks, paying 200 HOWEVER
This is my take too, although I'm not prepared for a max400 reality to replace the max200, but... I hate all of the whingeing. Piggies at the buffet line seem to be the loudest on this subject.