I think the time of day really has something to do with it, because for professional bloggers, they track that and it always comes out that many of them post new content on weekdays, just before people go to work (because, it seems, that people like checking their email and stuff as the first thing they do in the mornings).
So I was really curious how things have been going here on tapastic. Is there a way to track this stuff? Like how Google Analytics tracks differents stats on your website? So far all they're tracking is the number of likes and new subscribers per day. I think they should get into the time of day more so that we creators can really reach the largest audience possible.