Marketplace concept help

Hello,

This is juist to clarify how marketpress can be used before we start something we cannot finish.

We have a multisite setup with a main site and several other niche sites around it. We also have supporter installed.

It is possible to have several shops (shopA.mainsite.com, shopB.mainsite.com etc) and then have the products for all the shops displayed also on shopMain.mainsite.com?

Or does it work by giving members access to shopMain to add their name, company and products? So you have one site with many company products from different companies.

Thanks