It isn't "Scorched earth". It's boycotting by proxy.

>Unity themselves have given enough incentive.

Sure, if they change on their own volition, then I have no need to boycott those developers. This adds to that incentive should they not do so.

(copied from my other comment)

I.e. I have no real way to boycott Nestle, but if enough people stop buying their products, the stores will carry fewer of them. Yea, the stores (or devs, or cafes) will get hurt in the short term, but only if they're insistent on not listening to their users/the market.