IMO there should not be an algorithm. You should just get what you have subscribed to, with whatever filters you have defined. There are better and worse algorithms but I think the meat of the rot is the expectation of an algorithm determining 90% of what you see.
Not in the sense that it's commonly used in this context. It's not a recommendation algorithm pulling from the whole platform based on what you're doing, it's far more controllable, deterministic process which only does what you explicitly request.
