Im not sure what dad pays but id say BTM is definitely worth it. I've found alot of stuff about physical game that i never saw on the net, and i've done some digging!
Another thing i like is the ball reaction charts. It compares all this years balls together on one chart. I'd imagine if you were person who didnt have a particular brand you followed you could just look at the chart and get the exact ball u were looking for. Also, each ball is reviewed by a Stroker, Tweener and Cranker, and the results all printed individually. So each ball, in reality, gets 3 reviews.
Pretty sure if you sub you can get on the net and go back thru their old issues online. That alone probly makes it worth it.