I am developing a web application which will display others stores products on my website. Mostly these stores are developed in magento. I want to display their products when user click on their products it will redirect to their stores. Most of these stores owner doesn't know about affiliate programs etc. I have searched on it and mostly I got the examples about banners. So my question is.. Is there anyway these stores owners could expose or provide their products list and track the activity for these products like purchase etc? How can a affiliated person track his history i.e how many customer redirect to magento stores products? I apologize I am not magento expert just trying to connect my custom website to magento stores. 
Thanks
Thanks