YES, you can use the same account to get 10$ off each time you order 30$ or more, you must sign up now and start saving money!!! Just try to wait till the first order ships before you put in a second one, this way they cant overlap them, hehe.
Trust me its much better than paying 34.99 + tax in retail stores for DS games!!!!
Yes i am going so broke from this deal as well, but i am saving a lot per game, it helps especially because i am not able to make it to the toys r us b2g1 because of the storms in amherst ny (there was still a travel ban last weekend when i wanted to go, and now i cant make it), its unlikely they would have the games i want in stock anyways, since i tend to go for the good obscure ds titles rather than all the movie crap they seem to have on the store shelves these days.
I am trying to take care of my wants for the most expensive games first (aka the 34.99 retail ones) then work on the rest.
I heard somewhere that the google checkout 10$ off will disappear on october 31st though, so if you want to order you better hurry, hence my massive buying.