I don't see where GP claimed that we subsidized bulk mail. My reading is that the complaint is that ads (which are by far the largest component of bulk mail) a

I don't see where GP claimed that we subsidized bulk mail. My reading is that the complaint is that ads (which are by far the largest component of bulk mail) are subsidizing everything else, which leads to us paying in time and attention for the benefit of whoever wants to send us mail. It also benefits us when we send mail, but most people don't send very much mail these days.