That would be near impossible. Most Fandom/Community/Whatever attempts at making a company (although you can hardly call Team Shanghai Alice a "company" as it is just one person, but I didn't have any other term to use here) notice them fail.One example I can think of is #Savetf2, which ended with TF2 team responding with a tweet and then returning to radio silence. Although because we aren't dealing with an AAA company here, we have higher chances of well.... I guess you can say "speaking up"? However the issue is that we probably would need at least a pretty sizeable minority with us and a way of persuading and forcing ZUN to stop working with Ruw, however the second part would be much easier to deal with.
Other than that I'm also quite pessmistic towards other solutions, however I don't know why as I can't really explain it. It might just be a gut-feeling though.
Also I apologize if I misunderstood something or didn't read something.