Found by @FloatyZebra

This is a competition from Floaty Zebra Login To Enter »

Floaty Zebra is proud to offer another #competition with the wonderful Electric Radio Kings to celebrate their release of 'Back to Black' and a chance to win this beautiful black obsidian necklace. See below how to enter and good luck! #giveaway #ERK #win

Sometimes promoters tweet more than once.
Tweets will only get updated when you re-fetch them. This helps you because competitions will no longer "jump" between pages when competitions get added or competitions finish while you are browsing them. Competitions get "fetched" when you login or manually re-fetch them with "Forget Ended Competitions & Fetch New Ones". Additionally hidden tweets will stay visible until you "fetch" to save reloading the page and save you from losing your position.