This scam belongs to the Timeshare scam group. Somebody conducting a survey approaches you on the sidewalk.
After a few questions, they will politely give you a scratch card as a token of appreciation for your time. The card is a winning one (lucky you!), but in order to get the prize you have to visit a specific resort. Once there, you will be stuck for a few hours into a hard sell aggressive timeshare presentation.
How to avoid: don’t get involved, every card is a winning one. For complete details about how the scam works, check the Timeshare presentation scam.