Thanks for all your info, i can’t remember where i heard this from, but i just remember hearing this from somewhere
i was actually on couple flights with less than 2 economy seats left, sometimes with all taken, but i guess there was too many GS flying on my flight

Also I’m not worried about being bumped off, since in case of IDB they take elite status into consideration. Being a 1k means unless everyone else on the flight is 1k also it wont come to me... also, i doubt UA would deny boarding for anyone without any compensation, especially after Dao-incident. They just can’t afford to take another hit on this matter.