I would think Sideshow makes enough on distributing Hot Toys product alone to keep the doors open, lol. While it may take a little longer for things to sell out with the NRD, pieces still seem to sell out, and that's all that matters. Not every piece is going to go gangbusters and sellout the first few days it's available, especially some 2nd and 3rd tier characters.
2 examples: Silver Surfer and Morgul Lord. These pieces were given hell by a lot of collectors, and it did take a while to sell out, compared to previous releases, but now that they're gone? Morgul Lord Excl. is already on the rise on the secondary market.
Anyone who thinks Sideshow has a financial 'problem' isn't really paying attention. SS is putting out probably 3 times the product they were just a few years back, and the majority of it is still selling out. That's quite a bit of incoming cash. I think SS will be fine.