Там написано,чтоб зарабатывать этим,надо на балансе иметь 3 милиона xem 
Make an account and have at least 3,000,030 XEM in an account.
Note: 3 million XEM to be able to participate in the program, and 30 XEM to be able to pay the fees for activating delegated harvesting and sending the enrollment message. The message fee depends on the size of the message text, so 30 XEM might be a little bit more than you really need.
https://forum.nem.io/t/nem-supernode-rewards-program/1735
Make an account and have at least 3,000,030 XEM in an account.
Note: 3 million XEM to be able to participate in the program, and 30 XEM to be able to pay the fees for activating delegated harvesting and sending the enrollment message. The message fee depends on the size of the message text, so 30 XEM might be a little bit more than you really need.
https://forum.nem.io/t/nem-supernode-rewards-program/1735