I asked this same question over in the RS forums...
I've thought for a long time how much better these games, RS/BS, would be if there was a paid version. I've played for 6 years and spent thousands of dollars on them, whether deliberately or by falling into the carefully constructed gem traps.
Maybe a flat fee per month, a one-time sizable investment, I'm curious what ideas could surface from the clever minds of my fellow players.