As of today I haven't skip any trade, but time will tell. I did have some nasty trades with this member in question and after exchanging poor rating I've never heard from him again, if I do, that will be mi first cancel trade.
I don't know how the exchange parties are pick but there should be a more variety of members, among France, Spain, Germany and the Netherlands I have over 200 trades, with Greece, New Zealand, Iceland, Taiwan and Turkey 5.
Go figure.