oh i see, that wasn't clear in the settings, i wasted half a day trying to find a switch to turn it on after taking the time to configure it.
if an option requires an addon to work the settings should be hidden until the addon is installed or it should be clear that the option requires the addon, having the form for google authentication makes it seem like its a built in function. there was no indication that it was a paid addon leading to a bad day for me.
It might also be helpful to put together a bundle with all the easysocial addons rather than making customers buy them individually.