There are a few blockout dates for the TOTW lounge. I haven't found 100% confirmed policy about this, but the blockout dates supposedly limit TOTW lounge access to owners staying at BLT those nights. Generally it's the nights of special fireworks shows. I'd love to see the official explanation and policy regarding it though. Do you have to be both a BLT owner and staying at BLT on points? BLT owner but staying on cash or at another DVC resort? What's the matrix for those days, not sure if anyone knows.
So if you want to see the July 4th or NYE fireworks at TOTW lounge, being a BLT owner is a plus.