Create an identity for your community that your members can wear or share around. Swag/merchandise is a great way to delight your members. The more thought put into it, the better.
Here are some ideas for merchandising:
"Merch supercharges communities. You’d be surprised what designing incredible merch can do to a community. It gives them a “raison d’etre”"- Greg Isenberg
SwagUp - send swag to remote teams and customers to keep them engaged
Handwrytten - send hand-written notes at scale.