What's this talk about the game not being promoted? I've seen PlayStation Adverts for Omega Collection pop up all over the net for weeks I think it's has a fair bit of promotion. Most of my friends list consists of Wipeout fans so streaming it wouldn't really do much for the game seeing as most of them to have it already.
Furthermore claiming streaming is cancer is stupid, I doubt any game has attributed massive sales loss due to all those lazy people watching streams.