I have been reading the rule and testing the coin app geoclaim and I think I understand how it runs.
The Geoclaim is a must if you are always farming in the same area. If you don't put in any money, the 10% of the geomining reward you get from the area will be share with those who put in coin in the geoclaim.
However, you also need to understand that the coin you put in wil not be return. Which mean if you put in 100 coin in area A, you yourself must geomine at least 1000 coin in the same area if no other owner doing geomining in Area A since it stated the amount that will be given if based on the 10% geomining from Area A.