Playing its part in the ongoing game of shameless social network feature copying, Twitter launched stickers for all users last month. These let you spice up your pictures with emoji and other cartoony overlays before posting them, and you can also search by sticker to see what others are doing with them. It took all of five minutes for Twitter to suck the fun out of the feature, though, as Pepsi became the first brand to shell out for promoted stickers. And now Brits can feature in quarterly ad revenue statistics, too, with the launch of promoted stickers in the UK.