Sam Altman has said that ChatGPT is break even on compute. Maybe he meant ChatGPT Pro, not sure, but the idea they're bleeding money because of the number of users doesn't seem to be the case.

Obvs that's still a recipe to lose a lot of money on talent, training and other things. But they have a lot of room to increase prices.

Also the idea that a small drop in usage over the summer indicates a problem is nonsensical. Most new products have a big launch spike and then usage collapses! See how Threads usage spiked at launch and then dropped like a stone. If ChatGPT has only lost a bit of traffic over the summer (which is slow time anyway) then they're doing great.