It will disable incremental updates but as long as there is a flashable zip file of the full image you can update using that

You can also quickly unroot then do an incremental update and then use magisk to create a flashable boot image afterwards to re-root

Ah I thought I saw v3 when I looked it up, so about double the price then but with fees (and probably low demand) my original estimate was probably correct enough

About $15 per CPU on ebay or so, so about $121,000 USD for the CPU’s alone

Fair enough, completely understandable

You could try Smart Tube which has built in adblock and sponsorblock and see if that works better on your android tv box