I would add a goal system that rewards users with peepcoins for doing 'quests'. For example, if the user submits three reviews, then they will be rewarded with X amount of peepcoins. Another example could be if they are the first to give a review for a certain place, then they get rewarded.
Second Idea
Possibly add a posting that shows all the coupons or things that people can buy with peepcoins. Something like a prize corner, where you can buy certain things with peepcoins like cosmetics or coupons.
First idea
I would add a goal system that rewards users with peepcoins for doing 'quests'. For example, if the user submits three reviews, then they will be rewarded with X amount of peepcoins. Another example could be if they are the first to give a review for a certain place, then they get rewarded.
Second Idea
Possibly add a posting that shows all the coupons or things that people can buy with peepcoins. Something like a prize corner, where you can buy certain things with peepcoins like cosmetics or coupons.