considering the fact that:
-most attendees don't get a damn about who's done what, and some contests refuses identifications such as outros in the amv.
-most people coming to watch aren't part of the amv community/veteran congoers, so they don't have the "oh that amv what at this too" problem.
-the overall quality of a contest is bigger if we see 2 amvs from an excellent editor than one from the same editor and another one less good. and some contest refuses multiple entries in the same category, so the editor, at least, will send different kind of AMV ( not 2 Luffy vs Shiki AMVs on Linkin Park and Disturbed).
-Like Vlad said, there's most of the time a "overflow" timespan in convention where popular and/or non-finalist AMVs are shown. it's not the big shot, but that's still fun.
-if you think the judges favorite friends(oh it can happens, true story), don't bother to participate. explicitely biaised amv contest don't deserve attention.
-the spamming in North America is invalid; G-Anime have less and less amv each year( despite the fact they changed the staff after the disaster 2-3 years ago), otakuthon this year (live) had to add unqualified AMVs from last year to fill the contest , cape & kimono got less than 45 mins of amv submitted ( but that was a first official year)... ALL the north american conventions aren't shown on an equal way on communities, so please, consider everyone when you want to use "every convention". And don't be shy to participe to the mentionned contests, they don't bite and have place for everyone actually
on a personnal point , i think a "local/national" category could be a very good + for attendees (noticing they're is local people competing internationaly), local editor (more assured broadcast) and staff( promoting/cheering local talent). the "best amv in alberta" is a good example, but a top 5 ( if possible), can be as good too, depending on of much locals submitted.
counter-ranter out, and let's get the party started next week: