After a couple of trans-continental flights, I've finally managed to climb the MPO ladder will achieve gold status after this upcoming trip.

I was wondering whether any of you will know whether choosing a Y priority exit row/bulkhead seat (which is free for MPO members) may decrease your chance of an Op-upgrade as the seat assigned to you is also considered an 'at cost' seat and they may not put someone in that seat instead of you if there is no mechanism to pay for it?