This marketing approach comes from the time-sharing vacation condo industry. It's common to offer a free weekend in a vacation condo in exchange for two days of listening to high-pressure sales talks.
Thankfully, I can guarantee that no one who visits will be subjected to high-pressure sales tactics. Because that would be just lame on both sides - founders want to hire people who are excited to work for their startup.
Yeah, it's easy to see how you monetize something like this (hiring a good programmer has $$$ attached to it) and you don't need a hard sell to make it work. It seems like it'd be more like speed dating, where there's an intense sell from both sides but it's low pressure because either side can back out easily.
