While there are benefits of eager investors, stable (enough) infrastructure, low personal tax rates, etc in the US, in this context it's more that the costs of

While there are benefits of eager investors, stable (enough) infrastructure, low personal tax rates, etc in the US, in this context it's more that the costs of being in the US are pretty negligible when you're small. There's fixed overheads and lots of additional unfamiliarities in figuring out offshore and multinational business that don't make sense when you're a small startup focusing on developing your product and sales chain. Once you get large, though, the tax differences can start becoming the size of entire departmental budgets.