Yeah from what I can tell CH does not yet verify users like Twitter or Instagram. I'm sure that's coming, but I haven't seen it yet. I guess you could run a whole scam on CH right now and fly under the radar. I suspect this is what a lot of people are doing. Most of the rooms feel like getting stuck at the local motel 6 listening to a time share pitch.
Obtaining a second Clubhouse invite to use for your fake celebrity would surely be cheaper than paying the real one.
Once you have a ring of fake celebrity profiles you can even resell the service to others.