Crowdfunding is a fundraising process by participating users to support projects.
The term crowdfunding comes from the English "crowd" and "funding" terms that allow us to fully understand the collective funding underlying this method.
Lately, this gaining opportunity is always gaining ground in the internet world thanks to the rapid diffusion of BitCoin, the real currency convertible into real money.
To undermine (ie to create) these cryptomonets serve really powerful computers with very sophisticated hardware, all things that would cost too much for a single user.
Crowdfunding comes to the rescue and all users who want to take part in the project pay a certain fee and then enter the division of earnings from the creation of BitCoin.
As you can see, crowdfunding is equivalent to a cluster!
This revenue method is strongly recommended, though you need to be careful and evaluate which sites are going to invest their earnings.
Avoid at the beginning investing substantial numbers on crowdfunding sites; first see if the site is serious and timely in payments, then you can consider whether to increase your investment or choose other earning opportunities!