I'm not sure that such a thing means they support the change, it's just the rational thing to do given the change happening. As for why they would setup an alt

I'm not sure that such a thing means they support the change, it's just the rational thing to do given the change happening. As for why they would setup an alternate DNS system, they would get power over the DNS system and the money from domain registrations. In exchange, users would get more security and website owners lower prices and more friendly policies (now the reputation of those companies is on the line, and they care more about it than ICANN since they are selling other things). There's some anonymity risk though which might lead to strong opposition to the project if not addressed and while bundling and using Tor would work, it's not clear if Tor could take a few billion extra users doing tunneled DNS queries.