If that is true maybe that means that it actually is finite and has a center. And the rotation and light speed put an upper bound on its size.

Actually no, that would only be true if the universe was two-dimensional. The universe essentially curves back on itself. Kurzgesagt explained the two options of finite and infinity universes and this timestamp explaines the curving back: https://youtu.be/isdLel273rQ?t=120

Isn’t Canonical up to some crummy schemes, too?

If I understand this correctly, then this restriction only applies to Turkey. Which is exactly what you’d expect. If you violate local laws, then there are local restrictions. On a global level, everyone else can still interact with you.

Have I understood this correctly?

You should check out humblebundle.com. They have great book bundles that are usually DRM-free. Sometimes they have to be redeemed via Kobo, but that would be no problem since we are in a Kobo community :D

fanatical.com also have similar book bundles.