Once you purchase the disk space doubler and the inactivity waiver it applies to your entire account.
If you need the link, it's https://clients.x10hosting.com/order.php?step=2&pid=17
Right now we are having DNS problems which may be affecting your site.
I'm unable to load it on my first try but after refreshing I can get in (get a suspended page though).
core.9884 is probably a code dump file. It's a debug file.
error_log is just what it says. Contains errors
not sure what foo is
scgi-bin is not made by us (unless you mean cgi-bin; that's for cgi scripts)