As in source https://medium.com/helloiconworld/3-icon-development-roadmap-update-mar-2019-a12956535d26
Before the election of P-Reps in September, ICONists will be able to obtain I-Score starting in the third quarter through staking & delegating to P-Reps.
ICX holders will receive I-Score as an incentive by staking their ICX and voting to delegate authority to registered P-Rep candidates. During this pre-voting period, however, the nodes themselves will still be operated by the ICON Foundation.
I-Score accumulated throughout the delegation period can be exchanged for ICX whenever the ICX holders want to do it. These ICX rewards will come from the ICON Foundation’s existing treasury, not from the creation of new ICX. However, when decentralization finally occurs in September, ICX rewards will come from newly created ICX, not the ICON Foundation existing treasury.
