So IG ins't using collaborative filtering? The whole process starts w/ simple NN search in the account embedding space. Those candidates are then passed to the

So IG ins't using collaborative filtering? The whole process starts w/ simple NN search in the account embedding space. Those candidates are then passed to the ranking stack. This makes sense w/ what I see in IG recs: past behavior is strongly reinforced w/ littler diversity. Filter Bubble/Pigeon Hole problem. So in conclusion, I would argue that the IG explore tab doesn't have ANY explore at all!