After the reply I did add the following rule: "When you buy a CW, you are paying for the right to submit this CW on the site and do whatever you want with the copies once they are on site (as long as you follow all my other rules; hand me the artist copy for all colors unless I state I do not want them, submit within 1-2 months, etc). You are not paying for the rights over my art. That said, you are not allowed to edit my art in any way at all without my written consent nor are you allowed to resell the art unless for the same price or lower than what you paid for it."

I was just a bit afraid that, if I ever had to block someone because of issues I might have had with them, they would go ahead and edit my artwork, when I was sure that they couldn't do it.

So I got confused by the "it has to be on your TOS" sort of thing.

But thank you for your reply!