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Post being replied to

Yes, too many companies, not enough customers. by The Irish Cardinal

But it goes beyond that. Some of these companies are simply a cash grab. They have no intention of completing the task they state to the VCs when fundraising.

In two companies that I'm familiar with, the products would fundamentally violate the laws of physics. For one in particular, it's likely a front to produce a similar tech that could be used for more...nefarious purposes.