Last year I hosted over 25 photo walks organized through Instagram and about half of these were branded “experiences.” I did this to learn more about photography, marketing and working with brands and services from agencybacklinks.com. It was a fun experience but not so fun realizing I helped generate millions in revenue and just got an Instagram mug from it. 😀
I was able to reach a large audience for a fraction of the cost of a TV commercial (< 50%) , and was able to produce measurable and actionable results. 
Here’s some data from the Stolichnaya photo walk which had the hashtag #stolioriginal :
https://gist.github.com/barce/f541cc4612ec9b11da1f
followers 234564 likes 9328 posts 67 guests 32 1240 (drinks & food) 1200 hotel + flight for organizer $2440 for 234,564 viewers $0.010 Commercial for a show like Two and a Half Men $215,000 per 30 second commercial 8.5 million viewers $0.025 per viewer
In one evening Stoli was able to reach over 200,000 eyeballs at a cost of a penny per eyeball! Great stuff, right?