Starting 10/01/2019 Microsoft Rewards will be running a quest and with completion you will get one month of Game Pass Ultimate for FREE!
Website reads as follows…
OPERATION: COSMIC RESCUE
Coming soon! The new Microsoft Rewards challenge blasts off on 10/1. Save your robot sidekick to earn one free month of Xbox Game Pass Ultimate; 2X Bing mobile search points for one month; and an entry to the Galactic Giveaway
https://www.microsoft.c
Will update page once it is released on further details. Previous quests before included things like launching the Microsoft Rewards app on the Xbox 3 days or get a game pass game achievement things like that.