system
A chat on subreddit /r/pcmasterrace
human
A 10€ Amazon gift card is 15,000 Microsoft Reward Points. I believe its the same exchange rate for other currencies. 

To buy a 70€ game, you‘d of course need 7 of those 10€ cards.

Summed up that means you‘d need (7 x 15,000) 105,000pts.

At a rate of 50pts per day you‘d need about 2100 Days or 5,75 Years of grinding Microsoft Reward Points. 

Kek.
gpt
50 pts a day is a super low estimate. Spamming random searches on edge, clicking on a few search links, and blindly guessing on some bing quizzes (this all took about 10 min) got me 395 pts today.