To tell the truth, I have reservations about an organization that will not release their boycott list unless you pay them for it.
I am happy donating regularly to a variety of pro-life organizations, but I am suspicious of any organization that sells its lists.
Indeed, I wonder if they can qualify as a non-profit organization if they do that?
I would contrast this with a similar campaign a few years back in which the Catholic League wiped out "Nothing Sacred" by listing their advertisers with contact information and constantly updating it as ads were pulled. I donate to this organization, but I appreciated that those who couldn't afford to could still help boycott the companies in question.