To summarize the article, "Make then under-perform by 20% and they'll stop being woke, to do that, buy 20% less of their stuff". Or a direct quote:

Proxy 20% of your army. Use Legos, other game minis, or whatever. Instead of buying new units, proxy 20% of your intended GW purchases instead. I personally use 3D resin printers, which are excellent (I have a full threads on 3D printing if you search).

Hold off on new purchases. Every quarter GW will release new exciting things that everyone will want to field on the table. I’m not saying don’t field them. Proxy them. Wait until the quarter is over before going out to buy the actual minis if you want them. That will completely throw off their quarterly projections and they will “miss rent” in our shareholder/landlord analogy.

This is pathetic. First of all, this won't make them under-perform by 20%, because not 100% of people will participate. Normies don't notice, and even in the warhammer player base, not 100% of people disagree with woke. People who do care have to make up for it by reacting strongly, not by "delaying their purchases by three months". I like playing games, and I don't buy 20% less of the woke games, I buy 100% less. These people hate you. They look at a story that features white men and they hate it because they hate white men. It's not about representation or equality, they'd have zero problem with a black woman making a story about black women ruling the universe. It's about hating white men. They will not stop when there are 25% female space marines, or even 50%. Women make up 2 out of every 3 college graduates, and they aren't stopping there. "Perfect diversity" is 0% white men. The correct amount to purchase from these assholes is nothing. Don't 3D print 20% of your stuff, 3D print 100% of your stuff, and ask your friends why they aren't. If you have such a compulsion to buy new plastic toys that you can't stop pouring money into the pockets of people who think you and your family trash because of your skin color and gender, you need to get a fucking grip on reality.