Does "image hosting not allowed" mean you cannot have GIF's that are displayed in your web page on the site? How else would you do it then?
5000 GIFs? That's quite alot. Automated scripts may mistake you for image hosting and delete your account.
You're better off uploading those images somewhere else (Photobucket or ImageShack) and then hotlinking them to your site.
It's clearly stated in the TOS that 110mb isn't for file hosting but for web content hosting -- images are allowed, but not too many.
Btw, wrong forum. This belongs in the Technical Question & Website Design forum.