well if you have 99 wc. you can wc magic logs and there 1k each but you cant make 500k an hour with low skillz
depending on your combat level you can kill green dragons and gather their bones, and hide I was lvl 84 when i did it and I made about 300k a hour so a high level could defenatly make 500k per hour, but if you have level 91 runecraft you can make over 1M per hour (doubling natures is the money possible to make in game)
You can merch items.
You don't make money that fast in RuneScape.
if you cant double (91 rune crafting) you will make around 500k an hour and doubling will make you 1m+/hour
There is no way to get money that fast in RuneScape.
you can make about 2000 in one hour
You will usually make quite a bit less than that.
Merching like a baws.
It depends on what you do. You can make as little as 5k exp an hour to over 2m exp an hour
Best way is to player kill "pk"
There are three good ways to make money with Runescape as F2P as you're aiming for 250k/hour. They are described here below
500k a show