I had the S4 Active and it took awhile for the forums to get established for the Active. It is more of a niche phone so it doesn't get all of the love of the regular models.
Perhaps because it's not as popular with a wide audiance and it's extremely similar to the S5 but with more protection... that was my take on it when I looked at it. Now don't be hating on me... that's just MY opinion.