It depends on how much she's revealing. I mean, I've seen girls who I can literally see half of their butt, and they are obviously asking for sexual attention, cause no one goes out showing half their ass just because they feel more comfortable that way. If she wears a normal tank top and some short for example, I don't think they're "asking" for sex, only when they were clothes that actually reveal too much, like their ass.
There is revealing clothing and comfortable clothing. If a girl is advertising I don't think it's for me especially or that's it's even for men. Women like to show off for other women, to intimidate them or make them jealous I suppose. Makes them feel better about themselves to get attention/provoke envy.