Would you be willing to send the money first to a escrow and then tell about the task?
If yes then you will be getting a number of high follower twitter account owners willing to take up the task. If not, then it is a risk on the side of the account owner to promote the same without getting paid. It is a simple equation.
How much is the payment anyway?
the request for this need has been completed. It's my conclusion based on communication through PM with this user.
They had a very short crowdfunding campaign which is finished as I know. therefore I think they no longer need this promotion.