The problem is (as always) the "bad user" case. You get some users who run at 100% utilization full time (or more because depending on your model they might be

The problem is (as always) the "bad user" case. You get some users who run at 100% utilization full time (or more because depending on your model they might be able to have multiple instances). They'll be the ones doing things like running a Discord bot in a popular server, or reselling the image generation or something. This kills your margin.