This idea that "the algorithm" is something you can just "publish" is a pernicious lie told by people like Musk - who knows it isn't true - to the general public who don't know better. The "algorithm" in reality is probably farcical calls to cusotm APIs that no current employees understand well enough to modify which is why Twitter hasn't changed anything in coming up to a decade - which is when all the engineering talent left.
And sure, you can say "Well that's a bad way of designing the algorithm" but then what you're really saying is that you don't want to open source the algorithm at all, you want to re-write the algorithm to satisfy your sense of how the world should work with no evidence it'll actually work.
