question

The most robust answer would be to use WritePlayerEvent for the player's response and then analyze those responses in a Data Warehouse. That could be through either our existing Snowflake offering or our upcoming Azure-based Data Warehouse preview.

If you're only running one survey at a time, you could try using Tags to separate players that respond yes and no. You'd use https://api.playfab.com/documentation/server/method/AddPlayerTag and then create segments based on the response values to see how many players responded in each way. That's a server API, so you'd need to call it from Cloud Script.