Of course it was marketing. The strip or parts of the strip do shut down about 10-15 times a year for publicity stunts. All in the name of advertisement. NASCAR does it twice a year. Barrett Jackson does it. New shows opening or shows changing hotels sometimes do it.
The tourist on foot, ALWAYS get a kick out of seeing car traffic stop and something parade in front of them. Whether they like cars or not, whether they like Caesars Entertainment or not, it gives the tourist a tall tale to take home.