They probably have just been mining on everyone's preordered hardware and made up the "delay" to make some extra money.
dude, you're comparing them to bitmain, the company that produces 100x speed mining ASIC machines, then it makes sense to keep the hardware to mine with it while everybody is still mining with a 1x speed GPU (thus making fraudulently loads of money, using very low difficulty) with the ACORN though, do you mean they keep a 200USD (at least) item that will give them once used another 30 cents/day mining eth or whatever crap?
hell, look around you , they even create false /fake coins to create demands for their mining ASICS. Don't compare anything to "Bitmain" they are the biggest fraud in the mining/crypto space.
Do use math first before you speak i'd suggest.