Can the TGP's in question identify that you are using htaccess like this?
AuthUserFile /dev/null
AuthGroupFile /dev/null
RewriteEngine on
RewriteOptions inherit
RewriteCond %{HTTP_REFERER} !^
http://.*domain.com/.*$ [NC]
RewriteCond %{HTTP_REFERER} !^
http://.*domain.com.*$ [NC]
RewriteCond %{HTTP_REFERER} !^
http://00.00.00.00/.*$ [NC]
RewriteCond %{HTTP_REFERER} !^
http://00.00.00.00.*$ [NC]
RewriteRule .*[Jj][Pp][Ee]*[Gg]$|.*[Gg][Ii][Ff]$ /index.html [R,L]
Or is there a chance of them banning you for protecting your own bandwidth?