Earlier quoted context omitted.
I imagine it has to be something that another company can generically understand and take over. A startup where the founders deep domain knowledge / connections is the key - that domain knowledge / connections go when the founder leaves.
If that's the case then why are they ok with the founder leaving? I don't think this is a scam or anything, I just wish I understood the mechanics of how their business works better than I do
A company that requires them to build a leadership team or hire replacement talent to maintain doesn't sound like what they are looking for.
If needed, the founder should do that first.