Addon to Multi-Vendor, Multi-Vendor PLUS, Multi-Vendor Ultimate allows setting up commission separately for each product sold by vendors.
If you're looking to buy this add-on in subscription form, is it available here: Subscription add-on
Extension to CS-Cart and Multi-Vendor allows restricting visibility of promotions in store (frontend) depending on selected parameters. If we don't want users logged in store to see all promotions, with this add-on we can restrict their view basing on ex. user group, which is defined in promotion conditions and assigned to logged in user. He will see only promotions with assigned usergroup condition working with his usergroup.