Regardless of what platform was used to distribute the game, I'm sure some of the proceeds will have an agreed distribution ratio between the platform (Steam, GoG, etc.), publisher and developer depending on the agreement among each other, with the exception of EA's Origin and Ubisoft's Ubi Store. Therefore, I don't wholly believe any platform will just sell a video game where the proceeds go to both the publisher and developer while the former gets nothing.

At the end of the day, different people have different interests and preferences in video games. If you like it, buy it. If not, just move on to the next one.