yup , common thing for pbb .. as_holes acting like they know best. Apparently they lock out counters they consider speculative, or as the guy there explained, PBB has too much exposure on that particular counter. 

So far, i have found KNM ( since they started falling ),axis and Farlim being locked out.

I'm sure there's much more.

BUT if u insist u want to buy those counters - u can call them up and place ur order (like going through a remisier )