Riot Games should count a 13:0 as a Double win so if you 13:0 someone it should count like you won 2 Maps and you insta win a Match when you pull it off!
well most people who are curious about the game will end up watching matches that are a part of the bigger tournaments (masters, champions) or with the biggest teams (sen, g2) and yeah i guess TL are popular but since the popular team was the dominant one then those 'curious people' will enjoy that