That's how it worked out for Matthew Parkhurst, co-founder and CEO of New York-based tech startup Antimetal. The company was ready to emerge from its beta phase, and Parkhurst wanted to make potential clients aware that Antimetal even existed. Antimetal spent roughly $15,000 on pizzas, packaging and targeted delivery to potential clients, venture capital firms and even tech influencers with large social media followings. It worked: Roughly 75 of the companies that received pizza have become Antimetal clients, Parkhurst says — creating a bump of more than $1 million in annualized net revenue, according to documents reviewed by CNBC Make It. "Obviously, the ROI [return on investment] is insane on the revenue side, compared to what we spent," Parkhurst says.

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Persons: Matthew Parkhurst, Parkhurst, Antimetal Organizations: San, CNBC Locations: New York, San Francisco