Commissions and featured sellers

Hi guys.

I searched through all pages in this forum and have not found a solution. I'd mainly have two questions:


1. How could I add a shop commission to isotope? What I mean by that is that I would want to use shop as a "multiple shop" option. Then, from each sale I would want the shop to keep let's say 10% as a commission. So basically, if I'm a seller and am using isotope to sell my products, I would get payed the sale amount - 10% that would be transfered to the eshop owner.


2. How could I use a multivendor eshop? Is it even possible to allow people to register and the sell their own products? If so, how could I add a featured seller option? That means that everytime someone registers, he could select an option to pay something to be featured on the first page.


Thanks