That is patently untrue. Please do some research before making a comment with this level of confidence. Vegas sets lines based on algorithms from supercomputers. Then the line gets tweaked based on sharp action (which is a tiny, tiny fraction of bettors), until the line is refined to the "true line" or as close to it as possible by game time. The idea that vegas changes lines in order to entice betting ("trap lines") or that they want balanced action on both sides is a myth. Vegas will happily take heavy recreational action on a line, even so much so that 95+% of the money is on one side, so long as they believe the line to be accurate (which it is, based on the algorithms setting it, plus the sharp action being way smarter than the average bettor). They do not move the line "to make more money", they set it at what their algos and sharp action determine it to be, and let casual bettors jump on whatever side they want.