I think the 20 minutes should have already happened - but maybe it's tonight (Tuesday). I'm never really sure when people say something like "Tuesday at 12:00 AM". In any social situation that would clearly mean Tuesday night, but in police reports and tech speak that probably means Monday night.
It will depend on how many people click it and then sign up for Kaplan. It's just an experiment right now - probably going to implement a sophisticated ad system to control that space. I hope it's not too annoying. Is it too annoying?