The filter allows you to change the options used to display Related Posts in the Customizer.
jetpack_related_posts_customize_options
jetpack_related_posts_customize_options-
filter wordads_excerpt_disableFilters enabling ads in `the_excerpt` filter
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filter wordads_content_disableFilters enabling ads in `the_content` filter
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filter jetpack_wga_universal_commandsAllow for additional elements to be added to the universal Google Analytics queue (ga) array
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filter wp_sharing_email_send_post_subjectFilter the Sharing Email Send Post Subject.
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action jetpack_plugin_installedSignals to the sync listener that a plugin was installed and a sync action reflecting the installation and the plugin info should be sent.
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action jetpack_plugins_updatedSync that a plugin update
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action jetpack_plugin_update_failedSync that a plugin update failed
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action jetpack_sync_save_postFilter that is used to add to the post flags ( meta data ) when a post gets published
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filter jetpack_sync_comment_meta_whitelistFilter the list of comment meta data that are manageable via the JSON API.
Jetpack Developer Resources 