For me, listing "ask" is a sign of unprofessionalism and I just move on to the next ad. I'm only comfortable with a rate structure based on location (in or out) or length of session. If the rate is based on how dressed the provider is or whether I should expect a hand job at the end of the session I'd rather hire an escort.
Years ago I called a masseur off an ad on massagem4m (back when there was a massagem4m.com and people weren't yet afraid to have actual phone conversations). One of the photos on his site was him in a weathered cowboy hat. I jokingly said he looked cute in the hat and did he wear it while giving the massage. He told me that would be a fetish session and $50 extra. I didn't schedule a massage with him.