For the people that were actually following the channel and using this, I know it’s been down for a couple days. Twitch issued an indefinite suspension on the account for violating community guidelines (?). Trying to get it back again.
For the Cloud UMVC3 community — I created a channel to launch cloud UMVC3 stations directly from Twitch chat. It's much simpler than navigating the years-old guides for setting up AWS. It is even a bit cheaper to boot.