When a person uses a .biz domain you must be with one foot back because you can be anonymous with this type of domain. You can close your domain anytime, and you don't need to pay a penny. Must .biz domain are used to test programming scripts and things like that, but nothing serioud. This Paradise is another internet garbage. Don't trust a satoshi and don't trust a word this people said.
I've never actually heard that about the .biz extension. I'm pretty sure they require all the same documentation as any other website extension; why would they be different? And I'm almost positive they still cost money to register as well. Where did you hear that about the .biz extension?
Personally I hate the .biz extension I think it is really tacky and unprofessional but I'm not sure if your information is correct.
