I see no reason for UA to change. BE is a teaser fare as was stated above. You may say you flew 7 flights on other airlines but my experience is that someone else is picking up the UA fares because the cabins are nearly always full. UA has no incentive to change their formula to promote more BE or reduce fees if they're selling near-theoretical max capacity for the flight. If they were looking to pick up more cash, BE is hardly the place to do it.