The Alphacool GTX Titan Black custom water block a couple of articles down is going to be €79 so about $110. So assuming this is a similar quality product that makes $70 for some silly LEDs.
Yep, I still don't see it as worth it but someone might.
Give it some time, I'm sure the other makers will get similar products out there with more sensible pricing. Things like LEDs are always a personal preference thing. No harm adding a little style to your setup if you don't go overboard on it.