Out of all of my travels since Covid began, I have only received one questionnaire like that. It was back in late August on a one-way from MIA-MSP-ANC. It basically asked if I was traveling for business, leisure, second home, family reasons, etc. I have been traveling monthly since Covid through various states (some with restrictions, others without) and this was the only trip I received a questionnaire on. It was only ticketed within 48 hours of departure, whereas the others were at least a week in advance or more. I chalked it up to just random datapoint gathering.