Hi, I have no idea how the HUKD owners make money on this site but I have no doubt you guys do somewhere! I assume that more members = more cash for you.
I think it would be great if you could offer a HUKD affiliate scheme of some description, perhaps not a pay-per-signup which might be exploited, but there must be some way to do it. I for one would take part. It would be kind of cool because it is in keeping with the spirit of the site in the first place.