They are deliberately keeping money from people outside Poland because they know that most people won't fly to Poland just to visit their branches.
They are scammers! End of story!
I think so: one of my VISA MB EUR cards has just been blocked (the one with more than 500 euros in it. The others are with their credit already spent almost completely and I was on the point of reloading them, but at this point I don't think that is advisable to load them).
On the website it says:
Card status: Active
but a transaction has been just refused by a shop.
[edit]:
mateo: can you do anything? / know something?