After missing out on ~$20 in CashRewards in the last eBay purchase I made I decided to make a tiny chrome extension that reminds me about CashRewards before I checkout on eBay.
All it does is replace the 'Proceed to checkout' button in the shopping cart with 'Proceed to checkout (Dont forget CashRewards)'. If I had more time and inclination a better extension could be made to work on other supported sites.
To install:
Extract zip file
drag and drop crx file into chrome://extensions/
http://s000.tinyupload.com/?file_id=16703803241199327328
Hope this helps someone :)
Please put it on the Chrome web store so that I can use it on my Chromebook! Thank you so much