Is there a way to avoid dyncing everything this is copied to the clipboard? Can I setup sync to only sync pinned items? Or is there perhaps another way to sync only certain items?
On the Settings > Clipboard Syncing tab, if you disable the "Sync all copied text automatically" option, that will prevent ClipboardFusion from adding everything that's copied to the Online Recent Items. Then only the items that you manually add to Online Recent or Online Pinned will be synced.