there are many reasons. One is that it has been here for ages. the software this forum uses is very popular so when a hole in the defences are found loads of spammers jump in and exploit them.
they do it to get links back to there website so they can get traffic or advert clicks or whatever there profit motive is.
I ran a forum on my site for a while and I was really pleased that i had 4 new members. The next day that had gone to 12 and by the week end it was 150. All plausible names then I checked them on a spam database and only one was a real person. I left the forum going for a month and in the end I got sick of deleating over 500 requests to join all from spammers.
One thing this site does have is a lot of good peeps that keep the site virtually spam free........ thank you peep, you know who you are.....
Member of the Ishloss weight group 2013. starting weight 296.00 pounds on 01.01.2013. Now minus 0.20 pounds total THIS WEEK - 0.20 pounds Now over 320 pounds and couldn't give a fig...
Secret Asparagus binger