Interesting, I guess gnuplot generates very similar looking visualizations.

I think I got it after reading and looking more. I was confused with your forecasting plots, so the X axis is number of posts made while the y axis is the result in question be it votes, SBD or comments. Yes?

You also call some correlation, but the confidence in those calls must be very low. You should look at article profit versus total followers at time of publishing. I would suspect that more followers would lead to more SBD over time, however that too may not be the case.