Yes atleast those who don't have any money to buy domain names , they can easily make few netbucks here and then register domain names for blogs and websites .
Capital? Dude, you can get a .info for like a dollar. If you can't afford one dollar you shouldn''t be getting involved in business in the first place.
It's a win-win, as the admin earn money by running NB, he give back some of the earnings back to the contributing members.