Assuming your number is right (and I suspect it is at least in the ball park), Patreon takes 5% (5-12%, but we'll make another assumption here), and taxes in Sweden taxes on that much income would be around 50% total (progressive taxation, with the top percentage being 59% on everything over, I believe, double the average salary in Sweden.), so something like $800,000 a year. Which is still just fine, but DPC does live in a country with an actual social safety net, so you know....and you also have to account for the cost of doing business - his PC's are not inexpensive, and the electricity on 8 3090's running 24/7 isn't inconsiderable.
But no, the post he made said nothing about the Friday Prophets asking him for money - he has paid for plenty of songs. They asked him to remove their songs because they don't approve of the nature of the game. It wasn't a money issue, it was a moral issue. You can agree with them or not, but they get to make up their own mind over how their copyright is exploited. If they feel this doesn't represent their views on the world, it doesn't matter what kind of money he has. Musicians, for the most part, do not prioritize money, else they wouldn't be musicians!!! (Ours is the only profession where you will spend $5,000 on gear, which you put in a $500 car, to drive 30 miles, to play a $50 gig. It ain't about the money.)