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.
Aren't they only affordable for the first year though?
I use them when I need a random domain.
When I first bought an .online, it was not cheap