after the events of snapcon 2020 (when the forum got out of hand), the forum was basically shut down while they deleted a bunch of old posts (including the entire uncategorized category). That's when the rules got a lot more strict, in fact, they were a lot more strict than they are now. They kept the on topic stuff, but they removed a bunch of javascript related posts (I think), and non-snap related posts. That's why there's a bunch of posts deleted.
a bunch of new users came to rant about how they were banned "for no reason" on scratch, as well as a ton of other non-snap related things. It was crazy.