Y'all have to realize that 300 million is A LOT. She got 200 million with TMB because she had 201 dates, w/ the BTWB she literally cut the amount of dates in half. The fact that she surpassed (or will surpass) TMB's gross with HALF the amount of dates as her previous tour is very impressive. You could expect above 400 million if it had 201 dates like TMB did.
I was about to post ecxactly the same as you. This is 100% true
I'd rather her put out ARTPOP sooner rather than dragging out this tour.
If I was her I wouldn't have done a US/Canada leg this time around. I would have put ARTPOP out in Q1 and gained back some public appeal. That way she could have done an US stadium/arena tour during the summer but its too late now lol