Politics and sports have been intertwined for as long as there have been organized sports (https://en.wikipedia.org/wiki/Ancient_Olympic_Games#Politics). If e-Sports are in fact Sports, and if Blizzard intends to exercise control over political speech of ostensibly independent players, then ultimately Blizzard has accepted responsibility for its corporate political speech via the sport, which evidently includes a pro-mainland stance on Hong Kong.
Politics and sports have been intertwined for as long as there have been organized sports (https://en.wikipedia.org/wiki/Ancient_Olympic_Games#Politics). If e-Sports are in fact Sports, and if Blizzard intends to exercise control over political speech of ostensibly independent players, then ultimately Blizzard has accepted responsibility for its corporate political speech via the sport, which evidently includes a pro-mainland stance on Hong Kong.