There might be some other SC2 streamers who are interested, like winter / lowko? And Hera would bring in couple hundreds if he somehow decides to cast.Memb could stream, he already indicated that if there's nothing else why not and f.e today there isn't much to cast at aoe2 anyway.
German Streamers like Bonjwa could also be possible, I think this week there is one day especially for being together with German Influencers?
I guess there have to be some Streamers which don't stream yet but will turn in for the finals, otherwise the 7k for other channels seems more unlikely then the 20k on Nilis channel.