You can use the standard asynchronous code from Google Analytics if you wish, instead of using our version. All you'll lose is the ability to track cart button clicks and the Ecommerce Tracking data we insert in our thank-you pages when we detect a GA tracking cookie has been set using our version of the GA code. If you use GA's async code, make sure you also add it to your E-junkie thank-you pages, or redirect to a thank-you page on your site where you've got the GA code. To add the same code to every thank-you page we generate for you, paste it into Seller Admin > Account Preferences > Common Thank-you Page HTML.