I knew barely anything about this trend, despite spending a decent chunk of my day online, which I think is evidence of the modern web being decentralised.

However it's not so much due to the algorithms, which probably are trying to funnel most people towards the same products, but just the fact that there are so many people online now that you're naturally going to see the emergence of niches.

You don't have to read this optimistically if you don't want to - some of these "curated niche interests" can be pretty dark...