Fastest a company has backtracked on a bad decision?
So I was watching the CSB highlights about the DnD OGL fiasco from a few years ago. The fact that WotC had to backtrack so hard because their attempt at forcing all fan projects to give them money failed to the point where the people WHO MADE THE ORIGINAL OGL said "yeah we did not make it to say that".
Of course there's also like Gap making a new logo that they had to revert back to the old one because of how bad it was.