Some of these things would probably take forever: for example getting the roles and traits. A lot of GMs don't publish the full setup at the start or end so it would mean wading through dozens of pages for updates (as some also don't link to updates and threadmarks weren't a thing for old games).
Average game size though(number of pages, but also number of players), interestingly, is so standarized that I think a bot should be able to easily build a graph with the sizes of each game that has its own thread. Someone with more knowledge than me in web-development could probably do that in a couple of hours at most
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