What about multiple founders on the same stage?
That's fine. Sometimes the founders like to tell the story together and other times not. Our system currently lets you add 2 speakers exactly for this reason.
Another scenario in which you may feature 2 people is when the founder is being interviewed by a journalist or somebody else close to him - this strategy helped Startup Grind London get a lot of PR thanks to the collaboration with The Wall Street Journal which resulted in 100k+ online views.