According to Buzzfeed, Twitter’s Promoted Stickers will set you back $500,000. Not all of that needs to be spent on Stickers – advertisers can allocate some of it to other ad units – but if they want to play with Stickers they need to be prepared to open their checkbook for that amount at minimum. The story says the price of other ad units has dropped, but Stickers is new and will command a premium for a while because it’s new and everyone wants to be among the first movers. It’s unlikely, in my experience, that Pepsi paid that amount to be the very first a few weeks ago since they likely got a discount for that privilege.