It appears this may be the change in the “inflation model” related to the introduction of Parachains?
Update 1 in Matrix :
that was the era when the runtime was upgraded to v9340
Update 2 v9340 highlights and the v9340 Release Notes appear to be silent about a fairly material shift in the rewards program.
Update 3
opened 07:16PM - 23 Mar 22 UTC
closed 08:04AM - 08 Nov 22 UTC
The ideal staking rate in the inflation model of Polkadot is still hardcoded to … be 75% [here](https://github.com/paritytech/polkadot/blob/master/runtime/polkadot/src/lib.rs#L523). On Kusama there is already a more advanced mechanism that scales with the number of parachains and it is probably time to update Polkadot to that model.
paritytech:master ← paritytech:kiz-fix-polkadot-inflation
opened 08:50AM - 11 Aug 22 UTC
fixes https://github.com/paritytech/polkadot/issues/5195
We should probably als… o close #3011 as we move to Polkadot, as the current approach is kind of a guess, without taking into account the number of slots that where actually auctioned.
Not exactly sure if this makes sense, as it was added mixed with the guilts PR (https://github.com/paritytech/polkadot/pull/2587), which polkadot does not have.
Also related: https://github.com/paritytech/substrate/issues/8327
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