My wife and some of her friends are enrolled with a marketing group that calls from time to time to participate in specific surveys...somewhat like you described.

Food is provided, and yes, the payment for services are real. In fact, the ones my wife participates in, the payout ranges between $300-$400 per survey!

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2009 ML350 (106K) - Family vehicle
2001 CLK430 Cabriolet (80K) - Wife's car
2005 BMW 645CI (138K) - My daily driver
2016 Mustang (32K) - Daughter's car