That could be a good start to a more far-reaching cryptocurrency activity. Having read that what's given are only low value or not-so-popular coins, I think that the main goal hear is no the investment but the marketing. I think the developers are after the idea that Olympic-level athletes are quite popular with the masses, and therefore, having to know that they have agreed to receiving crytocurrencies, it would give more people the idea that if the famous are getting on the wagon, why not us as well. I think it's a good marketing move.