JUst so you are clear, you are not a jerk because you want a cbj from an sp who only does cbjs. You are a jerk because you made an appt with someone, then turned around and made it sound like you would leave if you didn't get a bbbj, and when she agreed, no doubt worried about the loss of income and any other lost buz by taking yoiur appt, you left without giving her any compensation for her time. You are a jerk for wasting her time, not for wanting cbjs. In that respect, you should be encouraged in your attempts to encourage sps to stop risking their health by providing bbbjs if they only do it out of fear of lost income. You ended up putting her in a position of agreeing out of fear, imo.
I would advise you tho that typically someone who charges low rates on bjs in general is going to be a bbbj provider, as it seems that they are the ones more likely to offer blo and goes rather than other options like r&ts as a way to generate new biz.
There are alot of cbj only sps, I doubt you'll get one offering blow and goes for 60 bucks. You do have an option of going for hjs tho, which should ease your mind alot.