Geo caching and content locking Idea

Just thinking out loud,

I figured that those 2.000.000 Gps geocaches attract even more people searching for them. Why don't monetize them?

My thought was to do an content lock on the exact location of the cache... And give them the coordinates close to the exact location, there you could
put op a Qr code or similar, directing them to your website hiding the coordinates with the lock.

If the base cache is interesting and fun to visit for them, they will go true the process with there smart phone and complete any online survey to get the coordinates from the base cache. And because of the effort they made too get there the click true could be 99%... They don't "surf away" they walk! (that's real visitors!)

Because i'm not active in geo caching i don't now if its against the rules of the game and communities.
So you decide, Me just sharing my thoughts...

Only caches of a non-commercial nature can be posted through this site.
geocachingcom

sorry if i'm bad, but i guess you won't get much traffic if they do not allow you to post your caches, at least on that site. am i right?