Temp Check: https://github.com/orgs/darwinia-network/discussions/1603

## Background

The control of CKTON’s issuance and economic model has been transferred to the Deposit contract, which is supposed to be under the ownership of KtonDAO (reference: [runtime/crab/src/migration.rs#L58-L79](https://github.com/darwinia-network/darwinia/blob/e9c5fad5b1345dcb3d3576e2e59384aab467d045/runtime/crab/src/migration.rs#L58-L79)). This transition grants KtonDAO complete autonomy over KTON's monetary policy and token economy, including the ability to independently govern future changes in issuance mechanisms.

## Motivation

This proposal is driven by two key motivations:

1. **Reducing Locking Duration to Minimize User Expectation Errors**:

Currently, the maximum Ring-Deposit locking period is 36 months. KTON rewards are issued and distributed at the time of locking, which can lead users to incorrectly assume that current KTON staking rewards will be sustained over the next three years. As RingDAO is actively researching improvements to the token economy (reference: [RingDAO Token Economy Discussion](https://github.com/orgs/ringecosystem/discussions/4)), these returns may fluctuate. A 36-month locking period risks users overestimating future returns. Reducing the maximum locking period to 12 months would allow users to make more accurate assessments of future returns, thereby avoiding unrealistic expectations. This adjustment also reduces resistance to forthcoming economic reforms from both KtonDAO and RingDAO, allowing for more agile monetary policy changes.

2. **Controlling CKTON Issuance and Increasing Market Appeal**:

A shorter locking period helps to limit CKTON's total issuance, preventing excessive supply that could dilute the token's value. By reducing the maximum locking period, CktonDAO gains greater control over CKTON’s supply, increasing the scarcity and desirability of existing tokens. This would lead to a more stable and predictable value proposition for CKTON holders, enhancing its overall market appeal.

## Proposed Change

Reduce the current maximum Crab-Deposit locking period from 36 months to 12 months under KtonDAO governance.

## Expected Impact

1. **New Crab-Deposit User**:

New Crab-Deposit Users will be guided(and limited) to lock over a shorter period, reducing the risks associated with long-term market and policy changes. This shorter locking period will enable users to better adapt to potential economic reforms implemented by CktonDAO and CrabDAO.

2. **Token Economy**:

Shortening the locking period will also decrease the overall issuance of CKTON, helping to better control the token's supply. This will maintain the growth potential of CKTON’s value, ensuring a healthier and more stable economic model.

## Conclusion

This proposal seeks to improve the accuracy of reward expectations for Ring-Deposit users by reducing locking period, mitigating risks related to long-term locking, and enhancing the scarcity and attractiveness of CKTON tokens. By doing so, CktonDAO will foster a healthier token economy and provide greater flexibility for future economic reforms. This change will reduce user uncertainty regarding long-term locks and establish a solid foundation for CKTON’s sustainable development.

## Related Issues

https://github.com/darwinia-network/DIP-7/issues/22