1) Built-in recirc 2) SEO optimized 3) Better tech than you'd get on your own platform -- e.g. the ability to act as an oEmbed consumer. The trade off is tha

1) Built-in recirc 2) SEO optimized 3) Better tech than you'd get on your own platform -- e.g. the ability to act as an oEmbed consumer. The trade off is that you don't have as strong a relationship with your subscribers. But considering that 100k page views probably only gets you 100 subscribers, most bloggers have basically zero chance at getting any real number of subscribers to begin with so for them using a platform like Medium is all upside.