XenLayer.com pays each affiliate, 100% of the first initial payment made by your referred client:
http://partners.xenlayer.com/
Our affiliate tracking system offers the maximum cookie and IP tracking period in the industry (150 days). This means once the affiliate URL is clicked, and if the visitor comes back to XenLayer.com for purchase any time in next 5 months, the sale would be tracked through the recorded cookie and/or IP, and the commission would be allocated to the affiliate accordingly.