User blog comment:Invader39/The End of BIONICLE/@comment-2122023-20160803115627/@comment-1827520-20160803142546

Because at their core, LEGO's primary target demographic for all their lines (including both runs of Bionicle) are children. While older fans may make up the most visible portion of most online communities like this, LEGO's biggest audience is and should be kids, so the fact that fewer kids were buying BIONICLE is pretty reasonable ground to end the line.