if it lasts 50 years it will be a big game thinking about it its on its 7th year so far and its only really open to uk/us and germany they are planning to make version on the game in spanish french italian chinse and many other lanauges if this does happen it means that there will be many more then 1million members and with the update of java consoles the game will keep to develope in graphics and size and features so at this present time it seems like runescape will stay for a long time if it keeps developing :D