This marks the day when Instagram switched from providing a service for their users to providing a service for advertisers. With this algorithm in place, they c

This marks the day when Instagram switched from providing a service for their users to providing a service for advertisers. With this algorithm in place, they can also sell premium positions in people's feeds. For this reason it also marks the start of a slow, eventual decline. It won't happen for a long time, but eventually Instagram will be replaced when the gap between user needs and what they get becomes too large, and a competitor appears with a solution to those needs.