RightBTC will sell put options with a unit price of 1 USDT/ticket at July 28 04:00 AM (UTC+0) at a subscription of 2,000,000.

For more information: https://rightbtc.zendesk.com/hc/en-us/articles/360046192231-RightBTC-Lists-Put-Option-Filecoin-for-Only-1-USDT