Yes, tokens in RuneScape are a way to earn money indirectly. They aren't cryptocurrency tokens, but rather "platinum tokens" that serve as a method for storing and moving large amounts of in-game gold, as they can be exchanged for 1,000 gold coins each. This system allows players to circumvent the maximum coin limit they can carry.
This is what I found on the internet:
lol well I haven't played it in a while so I had no idea about that.
Pretty cool that game is still kicking. It's been around for a long time.