I feel like some people are overlooking the fact that you can vote for some categories but not others. So, you don't need to play all 20 games before you can vote. You need to play 4 games from the same set. If the combo offered in one category doesn't interest you, check out a different category.
Also, if you truly refuse to play a full game of something that doesn't appeal to you, that may not be necessary, though I don't quite know what the minimum requirements are. It shows that I already "played" White Castle even though I started a solo game and quit as soon as I saw the layout. Eventually I planned to watch a video and try again, but it never happened.
On the other hand, I conceded a 2 player game of Castles of Mad King Ludwig and it's not showing as played.
Also, if you truly refuse to play a full game of something that doesn't appeal to you, that may not be necessary, though I don't quite know what the minimum requirements are. It shows that I already "played" White Castle even though I started a solo game and quit as soon as I saw the layout. Eventually I planned to watch a video and try again, but it never happened.
On the other hand, I conceded a 2 player game of Castles of Mad King Ludwig and it's not showing as played.