Well, Inno's main business site is back up
https://www.innosilicon.com/ but nothing regarding miners anymore...
Their main business has always been custom ASIC design services. They got into mining chips in 2013 when they did the design for the 28nm A1 chips for the now long defunct Bitmine.ch. Once they saw how wildly profitable making miner chips is -- they also designed the chips used in Dragonmints - and the rest of the hardware is when they launched their own line of miners.
Wonder if they've now gotten out of the mining chip business to focus on their core business once again?