Subscribing to a thread without posting is possible by using the "Thread Tools" menu and selecting "subscribe to this thread." Users noted that they often overlooked this feature, mistaking it for advertisements. Some participants discussed issues with unsubscribing from threads, as they continued to receive email notifications despite attempts to unsubscribe. Suggestions included clearing cache and cookies to resolve these issues. Overall, the discussion highlighted both the subscription process and the challenges some users face with managing their subscriptions.