Well one, the ratings have been fairly consistent according to info posted on wikipedia.
Two, you have to opt into certain programs to have your tv views recorded. If you have cable and you really REAALLY wanted to be sure your view was counted, you can log into cartoon networks website and watch it there. Also I think on demand views are counted if they’re watched recently after and episode airs.
But honestly SU is doing great, they’re releasing all sorts of books, one is supposed to be a yearly comic adaptation, they just got approved for a third season. Be calm friend. SU is not in any danger.