I started a SEO marketplace website ( fiverr model ) and now I need help in getting sellers in registering and creating jobs. I thought of creating a promotion on giving $10 for every seller who registers and creates atleast 2 jobs but the problem with this system is that it is easy to abuse. For gaining buyer , I thought of running an referral contest with 1000$ prize amount in the month of July. But this will be only effective only if I have enough sellers already registered in my website. Please give me a method to gain sellers.