- scroll speed - unsure of ulterior motives, but i've seen this even on some foss things. i think some people just think it looks cool/modern/"responsive"/whatever

- back - hijacking it seems fairly common on malicious/dark-pattern sites to try to trap you on them. not sure why because you can just leave and it seems it would obviously piss someone off

- analytics paths - not everyone may know about/how to use regex rules for it or may use something else that doesn't support it (the stripped down ublock for chrome? i don't know if it can or not). sites seem to do this with malicious js code as well, presumably to prevent blocking