If you're fortunate enough to place in the top 4 at more than one store, would you enjoy getting multiple wave 4 ships for free, or share the wealth and pass any extra ships won on to someone else, maybe the 5th place person?
I know when the news first came out about these, the store I play at (which also has a sister store) was considering giving store credit or some other prize to anyone who finishes in the top 4 at both stores, to give more people an opportunity to get the new ships which I think is a great idea if they stick with it.