I got an nice email:
I ignored it because I often login to my cpanel, and the site was still online. But a week later I got:
The renew link doesn't work (shows some error) but my site is online. I just want to get sure my account won't be deleted in 15 days...
And one more thing - fsockopen works only for standard ports (like 80, 53, 443). Could you enable all ports, because I would like to check stats of a cs server (via cron job - no connecting to the server every time the site is refreshed) and display it on my forum. What harm could it do?