Rent is falling, but nowhere near as fast as it should be.
These kinds of "algorithms" that are effectively "outsourced collusion" are the reasons why.
Even worse, there is zero reason why these companies should exist except for "collusion as a service".
Rental property pricing isn't rocket science. Set an occupancy target percentage and then adjust the price up or down to reach that target. The rental prices would then be responsive to the market conditions with absolutely no collusion whatsoever.
But that won't do what the landlords want which is prevent the price from going down at all.