Err... No thanks.
For us, the reward is getting out, getting some exercise and finding some Tupperware or funny magnet things... It's competitive enough for us with the statistics, county completion maps, FTF races etc. And our interactions take place face to face at events - not by hours and hours on a PC. I have no desire to "level up" or advertise my day out to all and sundry. Also I think it would create ability for cheating the system to take place, it would kind of ruin all those puzzle caches that others work so hard to create and we work so hard to solve!!
PS I'm not an old school cacher resistant to changes or am only using a GPS like a previous poster said people who didn't want this were... I have and use a smartphone at the moment but it's got so many limitations... so we are getting a GPS after almost 500 finds...