Does anyone have any idea (anecdotal or broad) how often this happens in startups dealing with large companies? Was the Best Buy case the exception or the rule? Pretty egregious.
When there is a real risk of this kind of thing happening, you would expect VSs and lawyers to advice startups against going into the deal. Otherwise, they're not doing (part of) their job.
The VC who wrote the article made a point that an unusual level of reassurance was needed before the technology sharing took place.