Where does it say bootstrappers can use this method?
I'd love it to be the case. My market is almost entirely based in the USA. I'm in Canada, but have no legal method to do any work in the US. So it's all remote now.
Oh, I added in another comment that I run a solo business. I don't think an L1-A would apply in that case, because I couldn't have a subsidiary without employees.
I could hire employees, but it would involve doing a whole new business model purely for the sake of a US visa.