When I asked the guy about the "qualify to win" part, here's what he said back:

I can't wait to hear what they say. I'm a season ticket holder who has pre and post game tailgated at Horseshoe since they opened. They've never done any sleight of hand like "qualify" before.

They've been running similar Ravens gameday promos since they opened. If today they were raffling off $7 they are in worse shape than I thought!

So it does sound like the "qualify to win" was just dumb language, and this was more likely a case of incompetence.