Sorry for the late response.
Does cjs support iAds?
If not, no big deal I suppose.
Yes, it does. They are included in MoPub.
Is construct 2 using the latest CJS plugin? It do I need to do something to get things working?
No, sorry, you have to update it after installing each C2 version, because the default version is really old. Remember to update the cocoonjs_prelude.js file in the html5 folder, because we updated it last week with important bug fixes regarding non canvas+ environments, as the new Webview+ for iOs.
Just in case, here is the link to the latest plugin:
In addition, I would like to remember that Webview+ does have DOM access. Canvas+ is for canvas based games, but Cocoonjs is not only Canvas+ anymore. Please, feel free to test our three environments (Canvas+, Webview+, System Webview) to see which one is more suitable for you game.