You said, "In both cases, the main/primary account designated becomes your singular account across all platforms..." and I got confused all over again. So, linking lets multiple accounts (Xbox and PC, for example) have access to each other so that I can access items on either account inside either account, yes? Then what does the merge option do, then? Will I basically only be able to access my account on one platform if I merge? Is that the idea?
Also, I can't really find anything this specific, but if I merge my Xbox account with my PC account (my PC account being the main account in this instance) and I am a Warlord on Xbox, what happens to the clan on Xbox if I remove myself via an account merge? Also, since I'm a bit thick in the head, if I merge my account, does that mean I can then use my PC account on Xbox? I'm a little fuzzy on the details.