Affiliate cashback website are in a way affiliate website with mechanism to capture each out going links with user id, click time, link etc. called as extra parameters.
Affiliate networks capture this data and shows for each & every tracked sale these click ID, user ID, click time and item purchased etc.
This data is again fetched by cashback website using an API and allotted the cashback to corresponding users by keeping some share of commission earned.
Coupomated offers completely automated cashback website solution that converts all URLs to affiliate deeplinked URLs and track, update all cashback transaction from top affiliate networks. https://www.coupomated.com/blog/coupomated-launches-fully-automated-cashback-coupon-website/