Yep, you’ve read it right. Add a domain or domain alias is no longer available for free G Apps accounts starting last year I think. Suddenly I just can’t add any more additional domains to my other Google Apps account. I think they found it to be a loop hole or something. Because when you have an old Google Apps account with 2000+ users, you can add additional domain without limit. So you don’t need to buy a Google Apps for Business account in order to enjoy all the features of Google Apps.