I've been asking for this for a long time! Every other platform allows me to pull analytics for sponsorships without having to bug the creator. But for Twitch, we have to ping and ask them to download their CSV, or take a screenshot. It will be so nice to do this on our own now!
Twitch is adding a new Business Manager role.
The role will allow the person to view your Analytics, Stream Summary, Revenue, and Sponsorships.
It will also allow your Business Manager to accept Sponsorships (which are usually far below market rates) on your behalf.