Even though I can't stand Mayweather, I think it is a great idea using him to help promote Stox. He can definitely help bring a lot of attention to the Crypto world, so many people especially here in the US still don't even know what bitcoin is.
I agree I think that Mayweather has helped bring attraction for STOX and now it has very good publicity. Not only that, I think Mayweather's promotion will bring more popularity towards cryptocurrency, not only for STOX but for the whole crypto community as well. It may make some people curious or interested to find out what is cryptocurrency because STOX is getting popular.