Proof of Stake systems, like ETH2, in general do not have enough protection against the natural tendency of concentrating most of the stake in a handful of large validators. The centralization tendency itself is a consequence of economies of scale and branding.
SKALE is interested in researching how amendments to GPL on Proof of Stake clients can be used to prevent centralization.
Possible amendments to include in the license:
- restrictions on the amount of stake the validator can control (say 1% maximum)
- restrictions on malicious behavior
- other things
What is important is that the amendments need to be compatible with GPL itself