Author URI: http://allanjosephbatac.com/blog/
It goes to the clicker's Google Profile (the visitor who clicked the button). Try it out yourself and visit your Google Profile page here: https://profiles.google.com/ It should now be under the +1 tab.
Absolutely. I just pray to heaven everyday that someone out there buys me a coffee. ;)
Simple. The Google +1 button helps your site stand out above the rest. +1 buttons let people who love your content recommend it on Google search. That's additional back link to your website. Cool huh? ;)
Follow me at Twitter @ajbatac or send me a mention. I'll reply as soon as I get it.