I participated in Automation Alley's #HackDPL last year (which was free) and in the last hour of the event, they sent out an email saying all submissions required a copy of the app's source code. Our team submitted ours since I was the only member of my team opposed to it, but it was a scummy move. Since this hackathon had a cover charge, I decided not to go. This doesn't surprise me and I hope Automation Alley gets it together.