This is a social research about the key drivers to understand why people fund projects via crowdfunding. What do the backers get back in return? What qualities do the most attractive projects have to appeal to the backers? Which are the qualities of promotors that increase the backer´s interest? What are the aspects that make the backers reject the project? Do backers have doubts about crowdfunding? This research was made by exploring opinions in more than 3.400 backers who have funded projects in “Lanzanos” the Spanish based crowdfunding platform.