its giving Nickelodeon money so of course they’re not gonna end it 😭.
Like it or not, the answer really is as simple as that. You could also make the argument that major Hollywood studios like Paramount (which currently owns Nickelodeon and the SpongeBob franchise, among many, many other things) and cable TV cartoons in general are not nearly as relevant as they used to be, as children prefer to watch their cartoons on Netflix or YouTube--stuff that has commercials, but not to the degree cable TV currently does in a desperate attempt to continue to stay afloat. Think "it takes you 5 hours to watch the 2 1/2-hour Home Alone 2 because you made the mistake of watching it on your parents' cable instead of Disney Plus, and they're just showing the same AI-generated commercials from Coca-Cola and Progressive up to 5 times in a single 20+ minute commercial break," that's how awful watching cable TV instead of getting with the times with streaming and YouTube is nowadays.
With that in mind, Nickelodeon holds the increasingly-dubious "honor" of being the only ad-heavy cable channel today's generation of children are willing to put up with (with Disney Junior and Bluey nipping at their heels, of course), but Nickelodeon's increasingly-rare attempts to get a new show off the ground (they still try to have at least ONE semi-popular show in addition to SpongeBob, despite popular belief) seem to go nowhere as children are pretty much only willing to put up with a dying medium like linear television for SpongeBob and Bluey, specifically. Between Paramount getting into the streaming wars too late with Paramount Plus and them only making money so long as younger generations still KIND OF watch 20th-century cable TV, it's understandable that their only choices in this case is to either continue to milk SpongeBob for all his worth, or cancel it, cancel Nickelodeon, cancel their attempts at children's entertainment entirely, and then just hang on before young adults start abandoning Survivor and CBS News, as well.
I do agree it would be nice if these consolidated mega-corporations at least TRIED harder to make something new and original with the insane amounts of money and US government influence they supposedly have (and not fire people in droves every time they merge on top of that), rather than treading water with zombie franchises that have seen better days until not even the likes of SpongeBob or The Simpsons can stop the 20th-century Hollywood studio model from being replaced entirely by something that younger generations would actually spend money for. But that's just not how things work these days, unfortunately.