@Tyrania
If there are not enough people using the system (due to crashes or different) and there are smaller bugs concerning the economy, people could make money through speculating.
So if you can buy lots of things very cheap (same price for the next 2 million pieces). Price goes up. Selling 2 million pieces for a lot (with the same price for every piece).
This is just speculation for now, since I didn't have the chance to test yet. I still crash when I open the inventory.
This depends of course on where the price changes exactly. Routine based or exactly at the right moment in both cases.
Anyways, just speculations why it could be reasonable to take the old system from time to time for different small bugs.