You can do parallel rendering jobs on a GPU. (Think of how each GPU-accelerated window on a desktop OS has its own context for rendering resources.)

So if the rendering is lightweight enough, you can multiplex potentially lots of simultaneous jobs onto a smaller pool of beefy GPU server instances.

Still, all these GPU-backed cloud services are expensive to run. Right now it’s paid by VC money — just like Uber used to be substantially cheaper than taxis when they were starting out. Similarly everybody in consumer AI hopes to be the winner who can eventually jack up prices after burning billions getting the customers.