Yeah this doesn't sound like a trap at all...
"Pilots attending EAA AirVenture 2024 in Oshkosh, Wisconsin, could offset some of their expenses by participating in a paid FAA research study. The agency is offering prepaid gift cards valued at between $300 and $500, depending on current medical privileges at the time of the study. Participants must have logged flight or simulator time within the previous six months."
https://www.avweb.com/aviation-news/...itive-testing/