The FAQ does not specify whether matching is AND or OR. My experience has been that nearly all exchanges (except for Yuletide) do OR matching, so I would assume that, but since one can request more than one fandom, just with different characters, I wasn't sure. It makes a difference when it comes to requesting two individual characters vs. requesting a group of them paired in a specific way, so I wanted to check.

Also, does "different characters or different character groups" mean all characters should be unique (none shared between requests) or can any overlap? I don't have anything in particular in mind here, but when I went to start planning my signup I found I didn't have this clear and I like to know what the parameters are before I start.