Update maintain-guides-how-to-chill.md (#2375)

* Update maintain-guides-how-to-chill.md

Summarize the contents in paritytech/substrate#8920

#2173

* Added content on Chill other

* Update maintain-guides-how-to-chill.md

Added suggestions from Danny

* Update maintain-guides-how-to-chill.md

minor correction

docs/learn-nominator.md

@@ -53,8 +53,8 @@ the fact that the solution set must fit in a single block, in some eras, a minim
 will be required to nominate with in order to receive staking rewards.
 
 This parameter can be updated via on-chain governance and the most recent and up to date version can
-be found on [chain state](https://polkadot.js.org/apps/#/chainstate) (selected state query -
-staking - minimumNominatorBond)
+be found on [chain state](https://polkadot.js.org/apps/#/chainstate) (select **state query >
+staking > minimumNominatorBond**)
 
 ### Oversubscribed Validators
 

docs/maintain-guides-how-to-chill.md

@@ -57,6 +57,13 @@ nominator under a heading that says "Redenomination required". If your validator
 involuntarily chilled, you will need to request your nominators to re-issue the nominate call in
 order to start nominating you again.
 
-[chill extrinsic]:
-  https://substrate.dev/rustdocs/latest/pallet_staking/pallet/enum.Call.html#variant.chill
+
+## Chill Other
+
+An unbounded and unlimited number of nominators and validators in Polkadot's NPoS is just not possible due to constraints in the runtime. As a result, multiple checks are incorporated to keep the size of staking system manageable, like mandating minimum active bond requirements for both nominators and validators. When these requirements are modified through on-chain governance, they can be enforced only on the accounts that newly call `nominate` or `validate` after the update. The changes to the bonding parameters would not automatically chill the active accounts on-chain which do not meet the requirements.
+
+For instance, let us consider a scenario where the minimum staking requirement for nominators is changed from 20 DOTs to 40 DOTs. An account that was actively nominating with 20 DOTs before this update would still keep receiving staking rewards. To handle this corner case, the `chill_other` extrinsic was incorporated which also helps to keep things backwards compatible and safe. The `chill_other` extrinsic is permissionless and any third party user can target it on an account where the minimum active bond is not satisfied, and chill that account. The list of addresses of all the active validators and their nominators can be viewed by running [validator stats](https://github.com/w3f/validator-stats) script.
+
+[chill extrinsic]: https://substrate.dev/rustdocs/latest/pallet_staking/pallet/enum.Call.html#variant.chill
+
 [accounts]: learn-staking.md#accounts