In a recent trip thru EWR to Europe, all the passengers waiting to board (in EWR) were given a card with a unique number and a website site url, Air satisfaction. Card did not directly mention UA but did mention IATA. In retrospect, not sure if this was UA sanctioned but was in plain sight of the GAs. Due to catering delays, boarding was delayed and there were plenty of people lined up for boarding.

Offered a bi-monthly drawing for 2 round-trip long-haul tickets. There was a list of previous winners on the survey site. Realizing that was a long shot, did complete the survey to see what was being gathered.

Has anyone had this happen? Is this UA sanctioned?

Summary
Used a 5 point scale Excellent, Very Good, Good, Fair, Poor, Did not Use/Experience
Asked about Reservation process (Ease of use, User friendliness, Visual appeal),
Checkin (Ease of use, User friendliness),
Gate Area processing, airport shopping, airport signage, food, Duty-Free
then
Departure Process (delay, boarding process, gate staff friendliness, Infor provided)
Cabin (quietness, temperate, storage space, lighting, condition, toilets cleanliness)
Seat (Comfort, sleep ability, leg space, width, cleanliness)
Crew/ pilot (Information provided, cursoriness, appearance, language skills, availability, meal speed)
IFE (availability, wifi, content selection, newspaper/magazine, sound quality, picture quality, ..)
Food / Drink (meal time appropriateness, quality, appearance, quantity, selection)
Arrival (punctuality, disembarkment process, speed of luggage)
Overall rating
Would you use UA for future flights
Would your recommend UA
Overall Value

Then appeared to select a dozen or so of the lowest rated items and ask to pick the 3 most important

Ask if there was any "overwhelmingly negative" experience?

Preference of this particular aircraft (764)

The reason of choosing this flight -- top three
aircraft, luggage allowance, flight schedule, previous experience, company policy, recommendation, inflight product/service, value, airline reputation, non-stop, frequent flyer program, price, ...

The collection demaographics-- frequency of travel (international), cabin, elite status, age, ...

and at the end offered a second survey with a $2,000 hotel voucher in addition to air tickets (if selected in the lottery)
This survey was about duty-free -- did I purchase any, why/why not, what promotions might matter, what potential advantage of duty-free might entice me, ... (I was a poor candidate for this purchase I have very, very rarely purchased duty-free ( maybe twice in 50 years of travel)

Why did I bother with this -- intrigued and bored sitting in a hotel room