I don&#x27;t know about anyone else here but it sounds like a nominally legal, if morally dubious, startup idea. Each month put a &#x27;treasure&#x27; somewhere, and sell a description for $10 on how to find it, once a year do a &quot;big&quot; treasure ($100 ticket) for people who have participated in 6 or more of the previous months.<p>The barrier to entry would be the ability to make reasonably challenging ciphers. The harder the cipher the more hard core the participant, but you need to sell enough &quot;tickets&quot; to cover the cost of the item and operating overhead.<p>Sort of a variation on puzzle rooms.