sISK token is issued as a proof when ISK token is deposited in the Governance Staking. As a token separate token from ISK, sISK is issued at the time of staking and burned when unstaked.
sISK serves the following roles in the Iskra Platform:
First, sISK is an indicator for distributing ISK Staking Rewards, which accounts for 20% of the total ISK issuance. ISK Staking Rewards are distributed according to the amount of sISK held by each staker.
Second, it will serve as an index for gauging one's influence in governance proposals/votes in the Iskra platform in the future.