In Poland, only PFFA has the rights to organise OFFICIAL polish championships, it's written in our status, so the one that wins a tournament like this is the OFFICIAL polish champion. RBSS i MOTG are commercial tournaments, with a huge sponsor and it's title and no federation has anything to do with those tournaments, so you can't call them official championships (RBSS was an open competition though). I don't have any clue about F3's status, but if they're registered legally as an world wide federation, then they have all rights reserved to organize official world championships - if I'm right, they organized the prague tournament together with czech federation, so for me the official world champion is Szymo.
As far as I know, KL contest was a part of tournee organized by F3 - there are 9 more coming up (only the top 8 from KL are sure to be a part of the next contest, the rest will be chosen according to their achievements) - the person with the biggest amount of points from all of the 10 contests will be the official world champion.