The main issue with publishing in Windows Store (or App Store), is our license. Take this for example about App Store (back from 2011): http://adium.im/pipermail/devel_adium.i ... 07973.html
Now I do not know if anything has changed in those 7 years (didn't follow that), but if they still don't allow GPL software, OpenTTD cannot really be published there. And changing our license is a lengthy process ....
Over the years we also had other people published OpenTTD as-if-was-their-own on these Stores, often for money, sometimes with or without a reference back to our website. These binaries are not produced by us, so we can also not tell you which source they represent.
So just to be clear: OpenTTD is currently does not publish its binaries on any Store. If you can find OpenTTD on a Store, it is not published there by us. Use with caution.
Guess we should check if GPL software is allowed on these Stores current day .. as if it is, it is silly not to publish on it.