Adding seats to an existing license

What is the difference between Reallusion Prime, Prime For Team, Prime for Business, Premium Plus membership and Corporate Membership?

What's the difference between "Individual SN" and "Unified SN"?

What is a perpetual license? Do I need to pay monthly fees for the software?

Can I use Reallusion software/content, and developer created contents, to create digital art to sell on NFT platforms?

Are there any discounts on multiple seat purchases?

I would like to set up a workgroup with different user accounts. How can I do that?

Can I install one license on two different OS platforms?