Even if they don't support customers they still have to support internal customers (everyone that works for Google). I worked on a project recently that didn't

Even if they don't support customers they still have to support internal customers (everyone that works for Google). I worked on a project recently that didn't support IE8. Nevertheless, the day after release there were a ton of emails from one particular office that the site didn't work. There was a bit of a panic, various theories thrown out (it's working for everyone else, why is it not working for this office, networking issues?). A couple of hours (and who knows how much money) was wasted in an all-hand-on-deck meeting to fix the issue before it was found out that this particular office had an IT department that only allowed XP+IE8 machines. When you get bug reports from internal customers it's never "the site isn't working in Firefox 33 with all extensions turned off. It loads but is a little slow.". The bug report you get is simply "it isn't working, you get a blank page". Answering those types of emails cost real money.