Their upcoming IPO makes a lot more sense now.
They have been propping up bitcoin cash price by (1) requiring ASIC purchases to be made w/ bch (2) not selling the bch they earn (3) actively buying bch with btc and (4) protecting the chain from 51% attacks.
As a result, Bitmain currently has a ~$500M bag of ~1M bitcoin cash that they can't sell without cratering the price. Even just selling a fraction could spook the bch market.
The IPO is a way of 'selling it' without selling it.
@mattodell @Dennis these valuations are wrong though. If you assume Bitmain to be a dominate bitcoin miner and manufacturer then yes. But the aren’t. Bitmain sole focus is on BCash. Which this filing shows. So if any investor is buying the IPO they are buying a company that it’s business model is to support an asset that is 1/10 the value of bitcoin.