In about 2007 or so my brother and I used to find super obscure blogs with no comments, read them and then write detailed responses to the author and share it with our friends. We always kept it positive, and said encouraging things. Most of the time the posts had been written in the 90s or early 2000s. We just did it knowing that probably one or two people would get notified of a new comment and maybe feel happy that someone read their post.