We created a distinction between stamps earned by shopping versus stamps earned from engagement because it is extremely difficult to moderate engagement. People can simply create false engagements and game the system. This would not be fair to the merchants that are providing products or services for Green Stamps.
Instead, stamps earned within the groups are used for gamification and supported by merchants. This means you'll earn interesting topical rewards for doing good and you'll see how well you're doing via a leaderboard!
Example: You may be in a food & dining community and based on your engagement may earn a free dinner or ?
To see your redeemable stamp balance, visit the IdeaBook.