Anyone ever remember Azubu.tv? Getting high profile streamers (like Faker for Azubu) to jump ship to another platform never works because even if the entire audience follows them to the site (best case scenario), they don’t become users of the site: they’re just there temporarily.
When Faker streamed on Azubu, there were usually like 5k viewers total on the website. When he wasn’t? Maybe 500.
Unless there’s a very strong push by Microsoft to get a bunch more streamers, this will fail.