alt Hacker News> had to go look at the git hub because it still didn't click for me
Obviously it still didn't click for you or you're lying about looking at the GitHub, because if you did, you'd have learned that it's not using DNS to run DOOM, only to store it. Which...shouldn't really be a surprise to anybody who knows that DNS TXT records exist.
And obviously your forgetting that doing this is from my perspective a very novel idea and I didn't consider a TXT record as a data storage system. Good grief.