Thirty minutes or less was not the mantra of two major pizza chains in Paraguay recently when they deliberately delayed deliveries to hungry customers.

Frustration, anger and grumbling stomachs were just a few of the symptoms of this recent cause marketing campaign. According to trend spotter Springwise.com, the companies partnered with the Food Bank Foundation and intentionally made customers wait to give them a little taste of what it's like to be hungry. When the pizzas finally arrived, each came with a note stating, "When you're hungry, you understand hunger."

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