It is just a satellite broadcast of Bitcoin blockchain made by Blockstream. I am sure soon there will be many other broadcasting either the same blockchain or whatever blockchain they want (waiting for ViaBTC to do it with their BCH blockchain). It's a free market, noone is blocking anyone else to do the same. That's where the decentralisation resides.
And ya know if like, Craig Wright would put down the mic and stop ranting and raving for a sec, he could grab his backpack and his Crocodile Dundee hat, hop a camel, ride out into the African desert tundra, sell some of his fancy smancy $20k mining rigs to finance setting up some low cost Bitcoin Cash satellite receivers for the unbanked and underbanked. Then come back, partner with a few sat companies, set up some uplink stations, start broadcasting the Bitcoin Cash blockchain, and voila!
Competition!
(yeah like that will ever happen. lazy blowhards can't be bothered, they'd rather bitch and whine.)