This explains why they blocked hyperlinking outbound URLs except for the 'bio', which I always thought was weird but in retrospect makes sense. Instagram has a

This explains why they blocked hyperlinking outbound URLs except for the 'bio', which I always thought was weird but in retrospect makes sense. Instagram has a lot of activity but it's mostly confined to Instagram as opposed to the dispersing effects of reading e.g. Twitter. Snapchat has a similar internal lock-in principle.