A:
If Sanus made mounts that conform to Logitech's atypical speaker designs, they'd be really popular.
Logitech's stands usually screw in on the bottom corner and at an angle. They are also not square or rectangular like other speakers. Users like me really wrestle with how to put them on stands.
Check out Google and see how many people ask, "How do I put my Logitech Z-XXXs on a stand?" The answer is always, "Buy an HTB3B, but be prepared to cut/bend the mount like this."