I've heard that before but all their PR says they only partnered with them on cross marketing campaigns and that Celine Lu is founder and CEO. Whatever the relationship, they seem to have first dibs on any new gear. If what you say is true, I don't see how they'll go bankrupt if almost all their plans are sold out. If they own BitDeer, they could survive on that alone, never sell gear publicly again, and completely control the industry until others create more efficient gear.
Shop is also loading normally again with everything sold out.
Ok probably the correct word is not "owns" but rather "controls", legally and on papers, it may seem like Bitdeer operates independently, just like how Viabtc pool seems to operate, but neither Bitdeer nor Viabtc can survive without bitmain, in reality, whoever the CEO is meant nothing as far as real ownership, whoever invests the most money has the final say. if Bitmain was to stop directing hashpower towards Bitdeer, it means they are gone, and it's really only a matter of starting a new company and a fresh website under a different name to sell the same thing again, so Bimtian doesn't need Bitdeer it's the opposite.
Now can Bitmain survive without selling gears? probably not, the money you see going to this cloud mining contracts isn't all profit, I could run the numbers but without having to do so I know selling mining gears is most likely much more profitable than selling these mining contracts, don't get me wrong, they are a great hedge against bitcoin price as well as a good source of funding for Bitmain, but they won't be enough to keep the business going the way it used to be, also their competitors aren't way too far, if Bitmain doesn't make an S21 by year-end, MicroBT will probably overtake the S19 pro by then.
With that being said I do agree with you, I doubt that they will go bankrupt, although I won't be sad to see that happen to them.