I hope that they don't start filling up the attraction with 5 minute wonders like these guys. A trip to Madame Tussauds should be to see waxworks of legends of film, TV, sports, music and history, not people who have just turned up that most of the world hasn't heard of. It would be a shame to start having figures that everyone doesn't care about and just walks past, flying through the place in no time.
They also aren't the first 'YouTubers' to be in Madame Tussauds...there's some others in London. Don't know who, but there are and no one cares about that exhibit either.