How do I add another website to my account and get another code to put on that website? Or do I use the same code and it's smart enough to detect it is on a different domain name? I have several websites I want to use this for and do not want to set up multiple accounts with you, there must be a way to add more domain names to my current account but I do not find how anywhere on your website.
The easiest way is to use the same code. Our software will automatically add that domain once we collect analytics data from it.
If you want to separate the analytics for different domains you can use a different profile. To create one, go to http://www.addthis.com/settings/publisher