This proposal aims to reimburse 50 pool members that didn't receive various amounts of pool rewards due to [this bug](https://github.com/paritytech/polkadot-sdk/pull/3110), which was fixed in the latest runtime upgrade. 

In short, when a pool enters the destroying phase anyone can permissionlessly unbond the pool members. When that happens any pending rewards are claimed. This bug caused the rewards to be sent to the caller of the `unbond` extrinsic, instead of the actual pool member.

We ran [this Python script](https://gist.github.com/michalisFr/a59d9da2b346a581aa8dedc171393534) to find the affected accounts and the rewards they didn't receive (credit to Kian who wrote it). The results can be found [here](https://drive.google.com/file/d/1gH6N-5YSz9Ip6UYv5MDc47_ePKpC2GbU/view?usp=sharing). I'd appreciate any cross checks to make sure the batch call has been built correctly and the proper amounts will be sent to the correct recipients.

To be clear, this is a double spend. These rewards have already been claimed by the pool owners who called the `unbond` extrinsics. But given that the amount is small, and trying to contact all these pool owners to return the misappropriated rewards would be troublesome to say the least, we believe this proposal is the most straightforward way to make these pool members whole and we'd appreciate it if the community approved it.

bountyId

curator

- **Problem Statement:** Reimburse 50 pool members who did not receive pool rewards due to a bug in the system.
- **Significance:** The bug caused rewards to be sent to the wrong recipients, impacting the affected pool members.
- **Proposed Solution:** Use a Python script to identify affected accounts and the rewards they missed, then reimburse them accordingly.
- **Expected Outcomes:** Ensure affected pool members receive their missed rewards, rectifying the issue caused by the bug.

#646 Reimbursement for lost pool rewards

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