In case anyone here hasn't heard of Fig they are crowd funding equity investment into videogames.
More info on their site here: https://www.fig.co/
More info on their site here: https://www.fig.co/
upside is capped at some fixed proportion of the income from the game
That's not usually what people mean by a capped upside. In a context like this I would take a "cap" to mean something like "your shares can't be worth more than 5x what you paid for them".