So when she's crawling sexually along the floor, they aren't trying to exploit her vagina for sales? They bring it on themselves. Tough. If you want to pose sexually, deal with it. She's acting slutty in the video, I have no idea what she's like in real life, but they full well understand that they are prostituting their music, even if they think the music ought to sell to a blind man.
Not all bands with female lead vocalists do this. Amaranthe has made that choice for themselves.
p.s. We've all seen Gildenlow wearing less than a speedo (refer to their last video). Nobody wants that. But plenty of women wouldn't mind if Tommy was wearing one.