Full disclosure: I am associated with this dive shop so I hope this doesn't violate posting rules. But i think this idea is something that other shops could copy to inspire more divers start diving and keep diving.
Octopus Gardens Diving in Port Townsend has hidden treasure tokens at two of their local dive sites. The tokens can be redeemed for valuable prizes (e.g. $100 plus prizes). Once divers register they can search and find treasure on any dive. Most other treasure hunts are limited to an event but this is planned to be an ongoing offering. Dive Caching is another great way to draw divers, but prizes for dive-caching are often drawings, whereas this is direct prize. You find the token you get the prize.
If you want to steal this idea there are more details at Octopus Gardens Diving Scuba Store and Training
Octopus Gardens Diving in Port Townsend has hidden treasure tokens at two of their local dive sites. The tokens can be redeemed for valuable prizes (e.g. $100 plus prizes). Once divers register they can search and find treasure on any dive. Most other treasure hunts are limited to an event but this is planned to be an ongoing offering. Dive Caching is another great way to draw divers, but prizes for dive-caching are often drawings, whereas this is direct prize. You find the token you get the prize.
If you want to steal this idea there are more details at Octopus Gardens Diving Scuba Store and Training