What's the Purpose?
You spend a large amount of money on your events. Often once you have the people there, you will only have the contact details for the person that booked if you are lucky, and there is no reason for them to shout about what they have seen.
Once you add an experience you are giving them a reason to engage with your brand.
Then you add a prize. An image that they are unable to create by themselves. It is through this medium that we can compile a GDPR compliant data set of people that are engaging with your brand.
Not only this, they are creating branded content that they would like to share with their social circle.
A well executed Branded Activation can make you more than it costs.