That was for the WGT Live Series. Not 100% sure that the eTour events will be on same platforms.
WGT info - http://www.wgt.com/golf-tournaments/etour/
eTour Info - https://etour.gg
It looks like the eTour is being done through Dreamhack(?) so they may be controlling how it will be streamed but no details as of yet. It does look like they use Twitch as well so I will assume it will be on there. It’s still 8 days away so I’m sure there will be more info coming soon.