The thread subject is nonsense, new and old ASICs compete against each other, you can't favour old ASICs.
The notion is as silly as CPU mining for mobile phones and not expecting other CPUs to compete.
If this is an example or "aggressive marketing" it's not encouraging.
You can favor older shitty asics.
ie an s7 does 4th
so limit miners to small hash rates.
it no gear over 2th can be allowed to mine
this limits to down clock s7 and or s9 one board and down clocked.
for instance i have 10 s9 miners they can do 12-13 th each.
all would be banned unless my 10 did 2 th or less
so set on one board and down clock.
no one would bother to do this to s17 or s19 as an s17 board does 17th downclock to 2th is a no go.
while a one board s9 does 4.3 th down clock to 2th can be done.
do i think this will work out nope.
I would advise them to do this with ltc/doge algorithm and restrict to l3+ gear or shittier.
ltc low hash
doge low hash
good names
and doing it merged means you lower the ltc lh and the doge lh does not run out.