They made a Gameboy game and now you're buying hamburgers.
If you're doing a 'vote with your wallet' thing to try to convince them to make more retro games that at least makes sense, even if id argue it's a little naive, but that's not even what were talking about. They made a videogame and now people are pledging to buy their hamburgers.
McDonalds obviously made the game in the hope that it will sell more hamburgers. If you buy a hamburger, their strategy worked, which means they (and other companies that are watching) have a reason to do similar things in the future.
What’s weird about incentivizing behavior you like in the hope that you get more of that behavior?
If their competitors copycat McDonalds' marketing, they totally didn't get that message, because by the time they clone it, the uniqueness McDonalds demonstrated does not apply to them - they've made a copy, or even a shadow of what came moments before. The edge McDonalds had is their cliff to behold unless they find something unique to counter with.
I’m enjoying the corporate apologetics personally. I’ve heard there is a Christian resurgence among the youth, and this makes me wonder if there will be a resurgence of pro-capitalism sentiment as well. Ideas, values, culture: it all evolves with time.