The changes are fueled by the information Jagex gathered from the Grand Exchange. This is one of the most significant advances in the history of RS gold the game. Jagex can make use of GE data to react to market changes and design updates to combat economic woes.
For anyone who is f2p and wants a good way to make money, I have been working on this a few days ago and have made 2mil in just four hours. Go to the Grand Exchange to purchase as many fire runes as want, starting at 2gp each. Then once you have your desired amount, go to the Aubury’s Rune Shop in south-eastern Varrok (fire symbol on map). Exchange with him and offer to sell all the fire runes you have to him. This is how you do it:
Cost of fire rune: 2gp Fire rune sells to Aubury for: 5gp each Profit: 3gp per. You could sell an hour of time for little more that 2k. If you’re quick you can earn 140k. The profit total per hour, 140k times 3gp, is 420k gp per hour (speed increases this amount).
We hope this will help. Please note: Grand Exchange prices vary often, and this method is only effective if the fire rune price is 4gp or lower to provide profit (it is not advised to buy OSRS gold use this method if the fire rune price is over 3gp).