Congratulations. You survived reading about a web serial hitting ten million copies, and you probably didn't even drop your phone in the toilet. Ten million is a big number, but you didn't earn it, so stop pretending you did.
The story from No Film School confirms that Dungeon Crawler Carl has sold over ten million copies, transitioning from a free web serial to a publishing phenomenon. Our own Book Six Review: The Eye of the Bedlam Bride Barely Worth Your Time already told you the series has legs, even if that particular book made you want to throw your Kindle at a wall. Meanwhile, Audiobook Narrator Explains Why Princess Donut Is More Than a Joke reminds us that Jeff Hays has been carrying this franchise on his vocal cords since day one. And with Jeff Hays to Voice Princess Donut in Show After Fan Demand, the casting is locked in for the adaptation. That is three separate pieces of evidence that this series has escaped the basement of niche fandom and is now eating the furniture in the living room.
The practical meaning for you, the reader who probably just learned about this from a Reddit thread, is that the window for acting like you discovered it first is closing fast. Ten million copies means the mainstream audience has already arrived. The show is coming. The fan arguments about whether Mongo should be CGI or practical are going to be everywhere. You missed the moment to be the cool person who read it when it was just a weird serial on Royal Road. Now you are just another person in the crowd holding a signed copy of Book Six and pretending you liked the Bedlam Bride plot.
The real question nobody in the No Film School piece answered is how long this momentum lasts. A web serial selling ten million copies is unprecedented, but the show adaptation will either double that number or kill it dead. The casting of Hays as Princess Donut is a good sign, but Peacock has not released a trailer. The clock is ticking. Watch the release date for the show trailer. That is the next real achievement, and you will not earn it either.