Its hereby suggested to change the withdraw fee of the za-pools from time- to price-dependen, with the aim to encourage user interaction and to achieve an improved stabilization effect:
Instead the current time-dependent fee reduction over 7 days from 1-0.1% , the withdrawal fee of the interest-bearing za-pools could be peg-dependen like applied to the Stabilize privacy accounts - The higher the price, the lower the withdraw fee and vice-versa.
This would nudge the user additionally to switch the pools when the price is above the peg, he may do it more likely compared with the old model where he just has the yield advantage, which might be not enough to convince him to switch. And if a user deposited shortly before the price moved, he will currently not switch due to the high time dependent fees, which hinders the aimed stabilization.
However, when implementing a price dependent fee structure, the min fee for exiting at e.g. >1.02 should be lower than 0.1% to reduce the friction of switching. A ballpark of 0.02-0.05% as min fee >1.02 would lower the barrier for switching, since the daily gain is somewhere between 0.03-0.09% at the moment. But at the end this probably creates more fees overall since users would switch more frequently.