You need to get a 51% off coupon code by simply writing a review on this page. You can write whatever you want. The code will immediately appear in your account and email. The code lasts for one month I believe. Yes you can make multiple accounts to get multiple codes.
Thanks to smacko for posting about it and making me check it out on GB. OP link shows 3 blacks and 3 whites: US/UK/EU plugs.
Do note that there are a lot of other items you can apply this 51% off code on. Even though the above item is not listed on that page, it still works as it is listed in the codes below. I have tried it in my cart and got a total of $18.62 USD (free shipping). Unfortunately, it does not work on the sale items ie deals that have a countdown timer on it like the Tronsmart QC 2.0 54W 4-Port Car Charger which is currently on special for $7.99 USD.
Here is a list of items that a store rep sent me:
345417 357155 357157 347054 351302 347252 359233 346237 347224 345775 359232 363627 359723 362048 357838 361350 358585 345776 347475 352282 363480 361658 347251 360164 357836 349887 360927 349373 346624 360172 347839 350588 357837 359726 360928 350587 346618 360176 360249 347843 362913 357872 358008 362909 358035 357896 359724 359725 361640 361643 361644 361648 361652 361645 361646 361647 361654 361642 361641 358009 358010 361637 346613 351043 359951 346616 358019 358014 360166 358013 346627 358317 358316 356045 358012 358011 361824 358017 323711 342427 353246 323617 363707 363708 363935 363934 343425 343423 343424 333806
GB is listed on CR but not sure if they will pay out.
/gif see below