I signed up for this and have had it for about a month. I did not link my credit card and am now receiving notifications that they cant pay me until I link my card. Im willing to overlook the privacy issues of allowing you in my inbox but I am not adding my credit info to that. You already have my email - why dont you offer PayPal? OR issue a gift card to a merchant of my choice once it hits 25- dollars or more? Find an alternative; its a great idea but needs some fine tuning...
Zenfrogs about Paribus: Money Back Shopping, v2.3