Of course Twitter and MAL, Anilist users aren't representative of the total anime viewing audience, so maybe, for example, Tonbo! may have been a hit among kids or professional golfers or some other high-spending demographic who don't use Twiter, MAL, or Anilist.
I am trying to think of demographics that wouldn't really be represented here and I came up with a couple ideas, but the biggest is probably kids. So, I wonder if a show like Tonbo! did well enough with a young audience to get a second season, but it just isn't showing up here.
It's pretty safe to say that Astro Note bombed pretty hard based on the staff apologizing about the show.