Promotional Incentives and Promotor Sale Tracking

I have a team of over 40 users that promote my products, and I would like to be able to give them each their own special “link” so I have a way of tracking how many sales they have made. This would allow me to provide proper rewards for those who push my products to be sold more, and would also help them understand how well they are doing!

Gumroad had a similar sort of affliate program that gave x amount per sale of a product through their special link.

I just want a way to give back to all the people assisting with the promotion of my avatars and assets, or at least have a way to keep track of it all!