How to rent out WTT tokens and get profit?

In https://giga-watt.com/ , I've sent 100 WTT tokens to giga-watt's my account.
I clicked "..." button and rent out the tokens at the rate of 4.2. (screenshots below)
Well, in this state, I'm getting profits? I need to do something additional?

https://i.imgur.com/GorLTXd.png
https://i.imgur.com/5O7p6iC.png
https://i.imgur.com/APp1zGX.png