More likely they didn't want to invest further in manufacturing current-gen technology whose bottom-end efficiency is pretty much on par with current or upcoming competition's stock efficiency, so they could put money into R&D for the next-gen stuff to actually compete directly with whoever Bitmain's worried about in another month or two.
That is a potent statement there! SPT have insinuated (even overtly stated) their main customers are not home miners, thus it would make sense that they did not put orders in for current generation chips, simply because their large customers would not be interested in that soon to be superceded tech. Surely, that makes bitmain saints in the eyes of the home miner, price rise or not. Question is, why would you begrudge a saint a dollar?