One thing is that it costs money to fly people out and that's a big investment when the person might arrive and not know jack.
One thing is that it costs money to fly people out and that's a big investment when the person might arrive and not know jack.
$2,000 to fly a candidate out and put them up for a day and stuff is a tiny investment for a company the size of Google.
I guess it's a question of how many times you want to do that.