There are some odd things in the Terms and Conditions:
"Pasting any of the following is forbidden and a violation of our terms of service: ... copyrighted works or links to copyrighted works that you do not own" Virtually everything on the internet is under copyright, so this forbids links, a primary purpose of the site.
"Permission is granted to temporarily download one copy of the materials (information or software) on Hopper's web site for personal, non-commercial transitory viewing only." I don't know if I'm reading that right, but it sounds like you can't get your stuff off the site :-/
"Pasting any of the following is forbidden and a violation of our terms of service: ... copyrighted works or links to copyrighted works that you do not own" Virtually everything on the internet is under copyright, so this forbids links, a primary purpose of the site.
"Permission is granted to temporarily download one copy of the materials (information or software) on Hopper's web site for personal, non-commercial transitory viewing only." I don't know if I'm reading that right, but it sounds like you can't get your stuff off the site :-/