The referral market is open now. It works in peer to peer mode.
You can sell your referral when meet following requirements:
1. Referral registeration > 8days
2. 7 Days Avg Earned > 50 satoshi or total deposit > 10000 satoshi
Coinpayu first referral contest from March 29th 2019 to April 28th 2019!
Win total prize: 0.85 btc ($3300).