I’ve seen entire advertising businesses spring up around worse ideas than this.

awesome idea - lets make it!

This is a great idea. I would also think it quite a good idea if you did the same with tags. Tag 100 items and get a set number of points.

My store’s have upward of 10,000 of items and when initially setting them up this would prove a great way of getting items tagged. Though like above you would need to validate the tags.