Each of them can be put in their own category and is/was very successfull in their own way. The common thing is that they are Steve Jobs imitators to the point

Each of them can be put in their own category and is/was very successfull in their own way. The common thing is that they are Steve Jobs imitators to the point of meaningless details like wearing same clothes as him or listening to the same music. There are many reports about Jack Dorsey being inspired/obsessed by Steve Jobs. Running 2 companies also rings a bell. As for Sqare, yes they are headed towards (big)? success, but they are not there yet. And from what I see they are much better at operations than inovations, which is different from what Steve Jobs was known for.