[mhermher]

There should be like this:

When you submitt your world you decide gold or silver.

Silver: You submitt your world free, it needs to be passed by 2 reviewers and it's head. Then you need to pass it.
When online, it will get checked everyday for copyrights and stuff.

Gold: You pay 20$ a month, and you get reviewed by you. Once it's up, you start paying. You get webhosting and other stuff.
You also get a new NC (The one kingdoms have) And will be put in a "Payed" list.