So from the article the Lae’zel ending only happenings if you
Super spoiler don’t think there’s a spoiler text accepted across all instances yet
Accept becoming a mind flayer and some events thereafter and then follow through with Vlaak’ith telling you to kill yourself. This “rare no one’s taken” glitch ending seems to be if you listen to Vlaak’ith, but don’t turn mind flayer you can still take the kill yourself ending if you check the mind flayer box …despite not being mind flayer. Which could only happen through a glitch. So it’s just a you could take this path if you’d checked X box but you didn’t so can’t “ending”. I’m not sure what this article is trying to say honestly as it’s literally just “if you make X choice you could get Y ending, but if you glitch the game to believe you made X choice you could get Y ending” article.
Sometimes they just make up whole new stories (Bleach) or say fuck it and go their own way (Fullmetal Alchemist). I feel like the more accepted recent approach though is having a mini-series of an arc which has normal pacing (actually even often accelerated pacing cause they only get 12 episodes) and then just putting the show on hold.
And then you have when the anime affects the manga and the manga starts stretching the story out for “content” (feel like this happened with My Hero Academia and Welcome to Demon School! Iruma-kun). If it was a novel that’s being published on a pay by chapter platform you’re just completely fucked because they (generally) follow the Mark Twain model of pay per word so once a story gets popular that shit absolutely gets milked into the ground. If you’re lucky they waited to do the anime until the comic adaption was half done at which point the novel will hopefully be done…