Valve has a plan for review-bombing on Steam

This.

The specific wording for the actual “score” on steam is “Do you recommend this game?” Thus it seems fitting that this could include things like a developer abandoning a game, a developer having unreasonable microtransactions, a developer selling a patched version of the game or a developer attacking streaming.

The irony is people are telling others not to support pewdiepie even if they like his content (gag) because they don’t like his actions as a person, but doing the same thing to a game when you don’t like the actions of the developer is somehow wrong.