I used to peruse Sportspages.com, a veritable cornucopia of sports links, including team sites, national and global newspapers, and the local papers for every team in every major sport. In the past few weeks, I've not been able to connect to the site, and I just wondered if anyone else was a regular, is still a regular (and it's just me having issues), or knows that happened to the site.
(also, sportsgoons.com - it just kinda stopped updating a long time ago, hilarious site)
What they may do is login to your account, and email your friends from it. Were the invites you received from your friends' email accounts? You could always create a test webmail account to see what happens.