I don't think Bitmain is hurting for money, but I could be wrong. More people than not say they mine with the hardware and release it to the public once they kill the rate and make money off of them. I wonder if they do mine on all the machines if there profit is based on the coins they mined or is the 3-4 billion in profit from straight sales?
This article from cointelegraph.com (maybe reliable, maybe not) says
"the four-year-old Bitmain reportedly made between $3 and $4 billion in operating profit in 2017, whereas Nvidia, founded 24 years ago, made about $3 billion during the same period. "
they were holding 30000 btc in dec 2016 1000 and in dec 2017 coins were 19950 plus add 30000 bch worth 2000
so 30000 x 1000 = 30,000,000 became 30,000 x 22,000 = 660,000,000 that is a 630,000,000 profit
of a traceable set of accounts they have.