Kickfurther is like Kickstarter, but you invest money to get paid interest rather than getting product. You get a $5 sign up bonus and then another $10 by linking your bank account. Minimum investment amount is around $20, but you end up only investing a minimum $5 to earn the $15 plus the interest on the investment when it pays out. You can start investing small and grow as your returns grow, too.
I have thousands invested through Kickfurther and I am seeing my money come back plus interest. I have made gains at an annual rate that easily beats good market rates (currently a 30% annual rate).
When investing through Kickfurther, you can also gain additional revenue from selling the products through your customizable Kickfurther Store. You gain 5% in commission, and you get paid back quicker than waiting for the monthly paybacks, additionally increasing your return rate. This also frees up the money to turn around and reinvest in more companies you want to help grow and earn interest from that growth.
They also have referral contests which can earn up to $50 each week and up to $200 each month, plus other bonuses for 2nd and 3rd place referrers! In order to qualify, you have to complete your account set up, and make your own first investment.