How would Konami know you are taking a stand against MTs by not buying their game? It could be a whole host of reasons why someone wouldn't buy MGSV. Maybe they don't like the story, the open world gameplay, the graphics, whatever. It's just an empty shot in the dark, far from tangibly related in their eyes.
Since that long winded post of nothing was obviously confused, I'll break it down.
Buy the game = Konami gets your money and knows you like said game.
Buy the game and use MT = Konami gets your money and knows you like said game and MTs.
Don't buy the game = Konami has no idea why they didn't get your money.
Buy the game but don't use MT = Konami sees how ineffective MTs with players.
The last point COULD lead to a deeper inclusion, as some companies take that as a sign to up the MTs, but not always. And while talking about it here doesn't help all that much in the grand scheme attention wise, going on Twitter, Facebook, or any public space and airing your complaints does. It happened with Ass Creed's terrible launch, Batman's horrible port, and Capcom's general stance on MTs, and it can happen again.
What I'm saying is, you don't have to buy the game to let them know you hate this practice, but you can still buy it and not engage in the shitty part of it and not feel bad, if you so chose.