Xbox Game Pass Ultimate is now available on Microsoft Rewards costing around 6500 to 6800 for every month. According to a Reddit thread, both Xbox Gold and Game Pass Ultimate can cost around 12000 rewards points or a little higher. So if you have enough Rewards points in your pocket then you can probably used that to get Xbox Game Pass ultimate. But getting that much amount requires a lot of grinding, with different purchases achieving 12K reward points will take time.
Below is short info about the cost of Microsoft Reward points based on the old and new total, the amount required to buy Gold and Xbox Game Pass Ultimate membership. The same is shared by Reddit user keelar for the info.
Xbox Gold:
1 month:
- Old: 6,800 points
- New: 8,500 points
3 months:
- Old: 15,000 points
- New: 20,000 points
12 months:
- Old: 29,000 points
- New: Not available
Game Pass:
- Old: 17,000 points
- New: 24,000 points
Based on the same calculation you will have to maintain around 97,000 to 144,000 which sounds impossible. The rewards points require a high amount of purchase or sales and maintaining an average of 11K points per month is still a not easy target to achieve.
Source: Reddit
