Think it'd be awesome to have the ability to enter Coupon Codes for specific Groups. So - for example - I have my current clients that I offer discounts to on future services. But as it stands right now, they have the ability to share that coupon code with anyone. But if I could assign it to ONLY my clients then it would ONLY work for them when they are signed in to the system - or use their email.
Not really sure if this is feasible - but it does seem like it could be something cool to market