That “ASIC” is most likely a scam. because there is no incentive to develop an ASIC. Network difficutly already going down, because zero market demand for grin coins and most of the current exchanges are fake anyway (bitforex). The chain will be subject to rollback attacks soon, because too few people mining it.
no demand, no mining, no security. PoW is not just a protocol.
Looks like you’ve posted the same factually incorrect statement multiple times in various Grin chatrooms as well. If you’re looking for an estimate of how many people are mining currently you should look at total network graphs/second, not the difficulty. The difficulty does not directly correlate with this as you are not taking the (still adjusting) ar_scale into consideration.
Total network graphs/second has grown pretty steadily from 200k to well over 600k since genesis.
It might be worth redoing your calculations before coming to the conclusion that there is zero demand and that nobody is mining.