In case you didn’t see this:
The fine print: The Roon Store is only available in the US. This is where we are located physically and it makes it a logical place to start. Additionally, distribution contracts can be negotiated in our own backyard, where we know the terrain. Sorry non-US people, we’ll look into options for you in the future.
Distribution, also for the partner products offered in the store, is probably handled differently for other parts of the world. For products from partners it’s on them, the partners, to decide on distribution rights and terms.