this goes right in line with making the number of individual "devices" the core reason you would have more of a chance of getting a winning result.... making all devices relatively equal by limitations of time.
I still don't think that will be effective, because if each individual device is capped at a certain hash rate, manufacturers will just make single chip usb asics.
that is fine as it still lowers asic efficiency quite a bit.
a sidehack 2 chip usb stick cost 50 bucks
a bitmain s-9 with a lot more chips is say 400
one does a lot less hash per usd
say 100 gh for 50usd vs 14000 gh for 400usd