Is just like you asking is advertising going to bring in sale, there is no quarantee of such because the product you are selling also must be right. What signature campaing does is to put the project in front of potential investors and since investors are looking to invest their money, they take information and research it, if it worth it, they invest and that is when sales is made.
well said mate, its advertising so its something that brings awareness in such ways so signature campaigns give the project a chance to be well known because every time campaigner like us reply to certain topics those campaign below our signatures will speak about the project that we are introducing if investors wants to find more about the details they will invest time and review so we do gather potential buyers.