At risk of resurrecting an old thread, can anyone chime in with the current policy on ski bags?

I just checked in to LAX-SUN and was charged $75 for a ski bag. Granted, it's about 200cm, but pretty light and certainly not overweight. The agent said golf or snowboard bags would not have been a charge, but skis do.

Is this correct?

Maybe this is an obvious question, but this is my first flight since status matching from AA EXP where checking this same bag hasn't been an issue and the online policy wasn't clear with the way their headings are organized.

Thanks!