This is why AWS took over the world. It’s the opposite: WYSIWYG vis a vis pricing. I’m not sure why so few other developer oriented SaaS services follow their lead.
It is convenient but AWS does employ another common tactic: the easily accessible prices are the highest ones. If you're a customer of any significant size you are being screwed if you are not negotiating a discount (IMO cloud is extremely expensive anyway, so if you have very high duty cycle usage you would be better off using something other than cloud).