What's there not to understand? Like me, he posts on this forum because he wants to. Like me he wants to get paid for that, because why wouldn't you? It's a way of supporting the bitcoin economy and it is a feature that I've never seen on any other forum, that is, renting out signature space. I don't know how sig campaigns came into existence, but it seems a little unfair that people who make quality posts get criticized for participating in them. They are, either explicitly or implicitly, endorsed by Theymos.
I have no problem whatsoever with signature campaigns. As I've said in other threads, it's a neat concept and seems to be unique to bct. It's the people who shitpost that ruin it for everyone else