docs(clay-ads): warn that ad sync deactivation is permanent and irreversible

docs/clay-ads.md

@@ -167,7 +167,7 @@ Yes. After your initial sync is active, an **Expand your reach** section appears
 
 **Notes:**
 
--   If the **Expand your reach** section is not visible, no additional platforms are currently available to add for your workspace. Which platforms appear depends on which ones your workspace has been granted access to — Google Ads requires a separate access request (currently in closed beta) and will not appear as an option even if you are already actively syncing to other ad platforms. Contact [Clay support](https://www.clay.com/contact) to request Google Ads access. If you need to add a platform that is not yet available in **Expand your reach**, the workaround is to deactivate the current sync and create a new Ad Sync with all desired destinations configured from the start. See [Will I be charged again if I deactivate and recreate an Ad Sync?](#will-i-be-charged-again-if-i-deactivate-and-recreate-an-ad-sync) for credit implications.
+-   If the **Expand your reach** section is not visible, no additional platforms are currently available to add for your workspace. Which platforms appear depends on which ones your workspace has been granted access to — Google Ads requires a separate access request (currently in closed beta) and will not appear as an option even if you are already actively syncing to other ad platforms. Contact [Clay support](https://www.clay.com/contact) to request Google Ads access. If you need to add a platform that is not yet available in **Expand your reach**, the workaround is to deactivate the current sync and create a new Ad Sync with all desired destinations configured from the start. **Deactivation is permanent — once deactivated, the sync becomes read-only and cannot be reactivated or edited; the previous sync remains visible as read-only history.** See [Will I be charged again if I deactivate and recreate an Ad Sync?](#will-i-be-charged-again-if-i-deactivate-and-recreate-an-ad-sync) for credit implications.
 -   You cannot add a platform while a sync is currently in progress — wait for the active sync to complete first.
 -   Google Ads and Bing Ads are only available for audiences sourced from first-party data (your own CRM or data warehouse). If your audience includes contacts from Clay's company/people search data, Google Ads and Bing Ads will appear disabled. See [Why are some contacts excluded when I set up an ad sync?](#why-are-some-contacts-excluded-when-i-set-up-an-ad-sync) for details.
 
@@ -222,7 +222,7 @@ Ad platforms report an audience as "too small" when fewer than 300 contacts matc
 
 A second factor: if Enhanced Matching is enabled, it uses a professional profile URL or Work Email column you designate to look up personal emails before syncing. If those input columns are not configured, Enhanced Matching cannot improve your match rate.
 
-**To fix this:** Because field mapping cannot be changed after an Ad Sync is created, you'll need to deactivate the current sync and create a new one. Map at least one email column, and configure Enhanced Matching inputs if using that feature. See [Why should I use personal emails instead of work emails?](#why-should-i-use-personal-emails-instead-of-work-emails) for guidance on which email type gives the best results.
+**To fix this:** Because field mapping cannot be changed after an Ad Sync is created, you'll need to deactivate the current sync and create a new one. **Note: Deactivation is permanent — the sync becomes read-only and cannot be reactivated afterward.** Map at least one email column, and configure Enhanced Matching inputs if using that feature. See [Why should I use personal emails instead of work emails?](#why-should-i-use-personal-emails-instead-of-work-emails) for guidance on which email type gives the best results.
 
 ### **Why is my Google Ads audience sync showing a "Failed to update audience" error?**