They are kind of like a Stripe or Twilio in that sense (in their current form)
None.
A super-fast growing company like Slack took 5 years to reach $200M in annual revenue.
Jasper.AI is growing quicker than that. $45M in annual revenue last year, targeting $75M next year.
I haven't paid a ton of attention, but my impression was that it's "sell our tech via an API." This relies on other companies building things that make a lot of money on top of that API. I know some are, but I'm not aware of any particularly successful ones yet.
Maybe someone will find a killer application for this that solve an expensive problem for someone. In that case, yeah, OpenAI will make bank. Or maybe the best you'll see is a bunch of small fries selling fun toys and OpenAI will never really take off in terms of actual revenue. Or maybe, by the time someone finds killer applications for OpenAI's tech, the tech will already be available from other providers (like GPT-Neo or StableDiffusion).
I wouldn't say that. There are a lot of companies making money on it already, there's definitely a market for it. They just aren't monetizing. It's more like how "growth startups" acquired users at a loss before turning on the monetization engine.