All! Jagex headquarters has been watching the RS gold Ironman Challenge become hugely popular and we enjoy watching the contestants take on it in livestreams and youtube videos!
The Ironman Challenge is a community challenge where players make an account as a RuneScape player and are required to be totally self-sufficient. This means that you are only able to use the resources you have for yourself and can't ask for assistance. It's an enjoyable game that tests your abilities and understanding.
As fun as this may be, there are some buy RuneScape gold limitations. You can't show the character you're portraying is Ironman, and you cannot prove that others are.