These alternative domains are quite popular with the fediverse and other hobbyist-run groups. Affordable domains with somewhat recognisable names still available.

Scam websites will use any TLD in my experience. Based on the ones that made it to my Google search results, .it and .info are the TLDs I should be blocking. When I search for "free roblox cash", most websites are .com. "Free robux" also brings forth a few .ca websites. "Free steam gift card" leads to .org and .com.

The only .fun site I know is neal.fun, which regularly features on the front page here: https://news.ycombinator.com/from?site=neal.fun

funnily enough, good.store which sounds like a made up example of a scam is actually a nonprofit ran by john green and his brother hank green

That's just because they're relatively inexpensive

Only .info is missing for the bingo :)

Because they are very cheap. If you are a scammer, why pay $5 for a domain when you can buy one of these for $1.

I use them when I need a random domain.