Shorten World contributor account is the account we offer special things on Domain Marketplace For Rent
If you are a contributor, your listed domains will be free for users who subscribed a plan. Then Shorten World and that user will share commssion later if someone used the domain
Any domain name with badge "Free" will be free for you if you subscribed a plan (please check Pricing page for more detail).
So from now on you can use unlimited premium domain names for free on our Domain Marketplace.