yeah that was the main consideration i had when playing the hand - whether i was better off keeping him in the pot with my draw or jamming. i thought that the fact that BU never folds means the pot is kind of too big to have a naked draw on the turn, even with position. i felt like i'd be best taking the line which gave me the most fold equity against the BB, so i could "flip" with the BU for the dead money. i'm still unsure which option i prefer taking when faced with the BB's donkbet to be honest.