Oh, there's cases of creators just putting down the content and noone noticing until some months later
It happened to me (I still have the proof in my wall as a thank you card of that novel existing).
And also cases of people enjoying the content, giving likes and commenting... and then forgetting to click the subscription button
I know, it also happened to me (In both directions, I did it and didn't notice until someone answered me back, and I find people who leaves mark in my comic while their library is misteriously empty)