Your speculation only speads rumors. We may never know how the situation played out, so why guess. Kevin did what he thought was best. It's his business and now Gaastras.
I speculate (oops, I guess I shouldn't do that) that Kevin probably had a good deal at Maui Sails and was happy with the sails and their performance. However, if I was in his shoes and saw the opportunity to get a bigger pay check, I would "test the waters too". None of the pros are getting rich in this business, so finding a better deal is probably something they are always thinking about.