My understanding, which I can’t prove other than to say it comes from folks affiliated with OpenAI, is that chatgpt doesn’t make money but also doesn’t lose money (in aggregate, some accounts use way more than others but many accounts are fairly idle), and their API business is profitable and accounts for most of their GPU utilization. I have no insight into why they would turn off signups for chatgpt other than they may need the capacity for their enterprise customers, where they make a decent margin.