Magento

Reward points for the money your friends spend as well

IE a feature hooked up to your account that allows you to email a friend/coworker with an invite to create an account on the site. From that point on not only do you get points for the money you spend but you also get points for the money your referrals spend.

There are two reasons why I suggest this

1) For many business word of mouth from satisfied customers is their primary source of new customers. This motivates this positive behavior and rewards it with free stuff or gift certificates. This can not only be some of the best advertising you will every get but also the cheapest. You can configure the points to be as worth as much as you want them to be to adjust how much this costs you and how much you want to motivate your customers to be your salesmen.

2) For many online business a customer simply never shops at one store enough for the points to have any real meaning. While they can still be a motivating factor they won’t be a strong driving force to always shop with you . It can also be cool for customers to know they are earning points without even shopping . They may even want to check in now and then to see how many points their friends have earned for them lately , anything that gets them to check back in with your site frequently is a good idea : )

Lastly it would be nice if the points were not arbitrarily assigned via how much an item or order costs but rather per item . Give each item a space to enter how many points it is worth or at least a space for “bonus points” . This can make some items more attractive than others or make your site more attractive than another if price and service are the same. It can also provide a unique way to circumvent manufactures pricing limits.