When CSM operators use the Lido protocol to run validators, they can receive two types of rewards:
<ul>
<li>Node Operator rewards: a share of rewards from staker locked stake amount, currently calculated pro-rata based on validators operated as a share of total protocol validators, with <a href="https://operatorportal.lido.fi/modules/community-staking-module#block-c6dc8d00f13243fcb17de3fa07ecc52c" target="_blank" rel="nofollow noopener">possible reductions for bad performance</a>.</li>
<li>Bond rebase: staking rewards pertaining to the bonded tokens (stETH).</li>
</ul>

What rewards do I get in CSM?

Node Operator rewards on mainnet are calculated and made claimable by the CSM Oracle every 28 days. Rewards do not have to be claimed during every reporting frame, and can be left to accumulate to be claimed later.
Bond rebase part of the rewards come from stETH being a rebasing token and the bond being stored in stETH. After each Accounting Oracle report that happens on mainnet every 225 epochs (24hrs), the share rate changes. Hence, the same amount of stETH shares will now be equal to a bigger stETH token balance.

How often do I get rewards?

There are two main reasons of you getting no reward within a frame:
<ol>
<li>If your validator’s performance was below the threshold within the CSM Performance Oracle frame (28 days for mainnet) the validator does not receive rewards for the given frame. Read more about <a href="https://operatorportal.lido.fi/modules/community-staking-module#block-c6dc8d00f13243fcb17de3fa07ecc52c" target="_blank" rel="nofollow noopener">the CSM Performance Oracle</a>.</li>
<li><a href="https://operatorportal.lido.fi/modules/community-staking-module#block-0ed61a4c0a5a439bbb4be20e814b4e38" target="_blank" rel="nofollow noopener">Your Node Operator has stuck keys</a> due to not exiting a validator requested for exit timely.</li>
<li>The Oracle report has been delayed.</li>
</ol>

Why didn’t I get rewards?

Adding bond is a prevention measure to avoid Exit Request for your validators if they became unbonded. <a href="https://docs.lido.fi/staking-modules/csm/guides/unbonded-validators" target="_blank" rel="nofollow noopener">Unbonded validators</a> appear if the Node Operator's bond is no longer sufficient to cover all the validator keys uploaded to CSM by the Node Operator.
If a <a href="https://operatorportal.lido.fi/modules/community-staking-module#block-3951aa72ba1e471bafe95b40fef65d2b" target="_blank" rel="nofollow noopener">penalty</a> was already applied, there is a relatively short period of time until the next VEBO report, which most likely will contain a validator Exit Request. During this period in between penalty application and the next VEBO report, Node Operators must top up bond to avoid Exit Requests for their validator(s).
Warning: If the unbonded validator has already been requested to exit, Node Operators can only exit it. The bond top-up after the Exit Request will not reverse the Exit Request.

Why add a bond?

Claiming bond and rewards in a form of ETH constitutes an stETH withdrawal process (unstake).
The withdrawal process consists of several steps you need to do:
<ul>
<li>Submit a withdrawal request by choosing ETH as a token for bond/rewards claim. As a result of this step, you will receive a withdrawal NFT.</li>
<li>Claim your ETH after request fulfilment. The fulfilment process takes 1-5 days (or longer), <a href="https://help.lido.fi/en/articles/7858315-how-long-does-an-ethereum-withdrawal-take" target="_blank" rel="nofollow noopener">depending on a variety of factors</a>. To know if your ETH is ready to be claimed you, can check its status on the <a href="https://stake.lido.fi/withdrawals/claim" target="_blank" rel="nofollow noopener">Claim page</a>. If your request is marked as “Ready to claim”, it is time for you to get your ETH back.</li>
</ul>
For more information about withdrawals, <a href="https://help.lido.fi/en/collections/3993867-ethereum-withdrawals" target="_blank" rel="nofollow noopener">follow the page</a>.