To know the TOS of a page, you need to read it. To know which links are part of a site and which are not, you need to follow the link. Having a TOS as part of the page content is akin to having a sign in a room, only readable by entering the room, that says "you are not allowed to enter this room".

Yes, this defense is being petty abotu details, but I find businesses using post-hoc discoverable limitations to limit people rights annoying.