I completely agree, with mobile adoption, addons reach will be incredible and I want it to happen just like any other dev. I will eventually monetize the app I

I completely agree, with mobile adoption, addons reach will be incredible and I want it to happen just like any other dev. I will eventually monetize the app I build but won't go down the path of using Google's own addon platform. It will likely be InboxSDK as you point out. The sad thing here is with InboxSDK being limited to Desktop but brilliantly feature rich, my adoption will be curved by desktop use only. I imagine businesses will be much more inclined to use Google's addon market place because the ease of deployment to users, rather than a Chrome extension etc. How have your Enterprise users deployed your app to users? I haven't noticed the + yet, I'll look out for this next time. Thanks for your suggestions.