reports Springwise in their latest trends newsletter. YokMoK, a Spanish adventure travel operator came up with this idea and it seems to me a great example of customer involvement in product planning. At the same time it offers these past travelers a reward for recruiting others to travel with the company.
Knowing how influential recommendations by friends are in the choice of travel products and destinations this looks like an effective way to take advantage of this and also get useful word-of-mouth support. Should be a model to be copied more widely.