Unsure if this has been suggested in the past, but... I know this was something that was originally planned to be implemented into rscrevolution classic before it became super popular, but I think it would be pretty sick on this server. E.g. giving the option players to purchase / rent a piece of land or house - either with gp/subs or purchased through the store on the rscrevolution site.
I know I personally would pay some $$$ to support this feature. Would be a cool community builder, I think...
http://s28.postimg.org/pfkazzb59/old_world_map.png