He's right, though. BAPE is a premium brand to say the least and it is absolutely no surprise that the shirt is expensive.
Honestly, there definitely is a reason behind LP diving into these product lines from watches to stylish shirts, to leather coats. The pricing might be insane for the average fan (or general person for that matter), but if its something that they've continued doing, it must mean that there are some hardcore fans, maybe even random consumers, that are absolutely buying LP branded products because of the look or just plain loving the band. Why else wouldn't they have stopped pursuing this by now? For fans complaining about ridiculous prices, that's what the LPU was made for. The average Linkin Park consumer that wants an official shirt directly from the source at a cheaper price (tho still somewhat debatable), can by it from them.