integration with cubepoint is an awesome concept . this would help to provide active users some thing back.
I suggest there should be downloader to uploader (or to provider) module so that when someone downloads or purchase a product, the cubepoints be automatically credited to provider user (say 80 %) and site owner getting (say 20 % points) as a result of that transaction.
another feature request is to enable copayment with cubepoints and other payment method (like paypal) so that an user can get some discount in lieu of some cube point. this can be done by generating discount coupon code from cubepoint and applying same to other payment gateway