The problem? The lot is privately owned and was not available for concert parking.
This used to be a common scam in many parking lots in the area and is apparently seeing an unwelcome revival.
If you have friends coming to shows, warn them not to pay to park in any lot without being sure it's a sanctioned lot. And if you see people directing cars into a lot that usually doesn't handle concert parking, call 911.
These poor fans' night ended with a double ripoff: paying scammers $40 to park, then paying Lincoln Towing to get their cars back.
Not a great way for visitors to experience Uptown.