The plugin 'Grief Prevention' has a popular option of rewarding players who play on the server longer with more land that they can claim for their protection. They earn more and more land to claim as time passes. Could you add a feature where as a player stays on the server, they "earn more radius"? As time passes, a player's protection stones can be expanded with a larger and larger radius.

Thank you for your consideration!

Personally, I think this would be a great benefit. However, if the field should ever be destroyed for whatever reason, then that additional radius should be reset to default... or, at least make it toggleable. Just my 2 cents.