So...don't stop supporting them?
I don't support Windows store at all (it's GfWL rebranded, and that was utter shite) and only use Steam for Kickstarter, gifts and so on, if I want to buy a game I do it on GOG or not at all. Microsoft buying Obsidian means they won't release their games over GOG anymore for certain and thus won't buy them anymore
The Nintendo eShop rating Thread: http://gamrconnect.vgchartz.com/thread.php?id=237454
The Steam/GOG key gifting thread: https://gamrconnect.vgchartz.com/thread/242024/the-steamgog-key-gifting-thread/1/