Originally Posted by MelancholicMariya
I think my favourite example which is shown in that blog post is Nanoha. That went from 4k to 22k. I don't actually know how it built so much interest, but it did. Makes me wish I want into Nanoha at the time so I knew how this series built itself up as this huge thing.
I'm surprised Strikers sold 22k though, as I remember people really disliking it for whatever reason. I haven't seen Strikers I just stuck to the original, A's and the theatrical remakes so I have no idea what the problem might be.
Nanoha took a popular side character from a spinoff to an OK game and transformed her into something entirely different. By the time of StrikerS, it was pretty much dominating advertising for Megami, for example.
Different communities like different anime. Right now, Hyouka, for example, is not popular at A-S but is at FandomPost. Also, as you know, there is also often a gap between what takes Japan by storm and what overseas fans like. This can lead to hilarious statements, such downplaying the appeal of K-On! (ignoring the Disney channel picked up the re-runs, etc).
tldr, clusters of people like different things.