He's not asking what the acronymn stands for; he's asking whether it counts as a 'use' if you use Facebook to login to a third party site, or hit a like button,

He's not asking what the acronymn stands for; he's asking whether it counts as a 'use' if you use Facebook to login to a third party site, or hit a like button, but you don't visit Facebook itself that day. I'd like to know as well.