Been wondering about this, now that Safari on Mavericks comes with the Power Saver "option" that replaces flash videos until you click on it, is ClickToFlash/ClickToPlugin useful anymore? What do they do that the new Safari Power Saver doesn't?
Also, set preload (or not), autoplay (or not), preset volume level for the media player, and control lists for which sites can use plugins without having to click (whitelists and blacklists). There are more, but those are just some features I use in ClickToPlugin.
Also, the power saver option in safari for Mavericks only disables flash that might not be what you were intending to look at (e.g. ads at the side of the webpage etc.). Clicktoflash and clicktoplugin disables all flash until you click it so it'll definitely be more power saving than the default one in Mavericks 😉
Also, set preload (or not), autoplay (or not), preset volume level for the media player, and control lists for which sites can use plugins without having to click (whitelists and blacklists). There are more, but those are just some features I use in ClickToPlugin.