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.