I'm not sure I understand your question about mechanics correctly. Are you talking about algorithm?
The expected returns depends on your participation on the network,
- 36% APY for Mainnet Validators
- 29% APY for Mainnet Delegators
- Up to 20% APY for Validators and Delegators Queue
Follow the development on github https://github.com/ElrondNetwork
They seem really active based on their repo.
Their social networks are also available for updates.
20.3 million supply did EGLD a good favor.