Since, presumably, nobody would try to sell a board with less RAM on it than shipped, a count-down scheme instead of count-up would work.
16GB board: no holes drilled in a marked area; 8GB: one hole drilled; 4GB: two holes drilled; 2GB: three holes drilled.
I can't help thinking that they want to sell maxed out devices to max out margin.
- 8GB Pi is out of stock / too expensive - due to RAM shortage
- Someone bought a load of non-8GB Pis
- Replaced the RAM with whatever they could get their hands on (cheap enough to be worth the hassle, cheap because no one else wants it even given the ongoing shortage - so probably pretty suspicious / of dubious quality)
- The end user buys it and has no idea it has been modified and the warranty is void
- RPi probably don't want to spend their time supporting it. Probably can't if the memory is a load of crap, even if they wanted to. It gets bricked.
The point here is someone bought something else (a fake pi) than they thought they were getting. Not that someone willingly wanted to go hacking.
There is always a reason someone does any bad thing. There is always obviously some advantage to the perpetrator.
The fact they are only reacting to some other bad actions doesn't excuse it because there are any number of ways to to react. This way is the one way they chose when they have infinity to choose from.