MarketPress +Affiliates

Now that MP has Affiliates functionality, can you all explain what it all means. More importantly, can you explain if there is a way for me to take advantage of it.

My primary setup for MP is on a multisite and I have several sellers selling products on their own sites. I use MP to create a global marketplace on the main site.

Can Affiliates now be used for by my sellers to manage an affiliate program,or is the link between the two plugins more global? Meaning: I'm the one who manages the Affiliates program and when someone buys from one of our sellers through an affiliate link the affiliate gets a portion of the sale.

If a description of what is possible with the two plugins please point me to it, I haven't been able to find it or understand how they are intended to work together.