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Leaks are a reasonable explanation, but it's probably worth remembering they're not the only one. When you've got reasonably smart people working on solving problems and developing products/services in the same space, a certain amount of convergence is going to be natural.

I don't work for either and this is one of several ideas I considered while thinking about that space, and everybody here has probably had the experience of watching a startup build something around an idea they had but never really shared.