Just noticed this, fyi, /kraken/ingests returns two separate entries for Sao Paulo and Rio, with the following domains:
$ dig live-gru.twitch.tv +short
37.252.238.27
37.252.238.26
$ dig live-sao.twitch.tv +short
52.223.209.157
52.223.209.156
...
$ dig live-gig.twitch.tv +short
live.twitch.tv.
23.160.0.85
23.160.0.82
23.160.0.89
...
$ dig live-rio.twitch.tv +short
52.223.208.153
52.223.208.156
52.223.208.155
...