Mips itself gets about 5 dollars per helmet, meaning manufacturers’ margins have been quite hefty previously. Mips has been a selling point used to justify the prices of premium helmets.
The obvious development is a shift from a safety solution only for the premium class towards a market standard at lower price points. This shift is accelerated by increasing consumer awareness, and at best, Mips would be a mandatory requirement for helmets in consumers’ eyes. So if and when the development path is from premium → “standard”, prices will indeed have to come down, especially regarding manufacturers’ margins. From Mips’ perspective, it’s good that volumes are growing, but at the same time, this might eventually erode Mips’ pricing power.