[atoav]

I used rented renderfarms a lot for VFX work. And many of those had a "if your workload stays like it is it will cost you roughly X after n frames rendered"-feature. Otheres made you transfer money first and you would get a warning before that money would run out.

The problem is that you can run into unexpectedly high cost without warning or option to decide whether it is worth it and one of the solutions would be to just tell people when the rate at which they use your stuff increases or decreases by a certain threshold. And because they can bill you, they also know (roughly) what the things that you use cost.

I never used AWS for serious things, but not being able to decide my spending will be a serious argument against it.