> You could ask users what split between games they think is fair (feels like a lot to ask especially if you're playing a lot of games).
Generate a pie chart based on playtimes, and then let the user adjust it to match their subjective experience. Pre-bias the pie slices by multiplying the default percentage cut by their rating of the game if they've given one.
I think it could create some fascinating effects - probably not ones they would want! E.g. players might punish someone like EA despite playing their games or they might reward "aspirational" games they barely touch.
