I suggest to get the best manage to handle that campaign because they already worked with a lot of project and most of them become successful.
Not all of projects which run a signature campaign will become successful especially if the campaign only last for a week or two weeks, it doesn't make anything change. I'd say if the projects want to run a campaign, they need at least run it for a month and they must offer a good payment since they need a high quality poster, the thing is most of high quality posters already joined other campaign. If they pay with low amount money, the participants are full of spammers.