I've been noticing a large number of people registering in my forums lately. They register and create a user account, but never post anything. This always seemed strange to me, normally I do not register at a site until I am ready to post something, otherwise why register.
However, I did notice almost all of these accounts had listed a website, which PHPBB does. And it was almost always an online poker site, timeshare, refi, or whatever the latest spam flavor of the month is. I guess they are registering just to get their homepage link on the PHPBB membership list page, thats the only thing I can figure.
Is this a common traffic building technique? I guess its not totally spamming since they don't post anything, just register. But it still seems annoying.