I worked for a company. They always build their own model to identify folks. Noone will use this as a service unless it is for an individual for some application.

Best would be to get this done and apply for a job ina startup. I can tell you that there are any other factors. Liveness being one of the most critical ones.

No.

I know a friend founder who is doing this for the last 2 years and had made connections but has not gotten any revenue earning projects.

He wrote bots to cold email many folks on a social app ( professional).

Anyways he must have contacted at least 2000 folks. All he got is do some POC with a couple of folks.

The only good thing was he got an idea of what people need.

Other than that his startup has 0 revenue. Product still in development .

So be aware.