More quests, bank space, Area to move around, some more weapons, higher leveled monsters, probably a minigame or 2. But playing for free is probably good enough
When I was nooby a long time ago I got scammed by "I can make more copies of your armor" and I used to think cowhides were rocks... But of course that was in RS Classic and the graphics weren't all that great. But they still look kinda like rocks