On reflection I wonder if it doesn't drop more because it's a learned habit and it doesn't unlearn in the time of the study.

However, I suspect the other complaint — that chronological feeds get overwhelmed by corporate spam — is fully true.

It's one more regular reminder that none of these companies want to charge a couple of billion users a couple of dollars a month to give them exactly what they are asking for — a way to keep in contact with friends and meet new ones — because that's just not enough revenue for them, even if they charge for optional features.

We're all worth so much more to them if we are addicted.