Microsoft Reward Points are server sided so no this won't work.
Also, MS Rewards is not worth it anymore, I've used it in the past (2021/22) when it was good, they've nerfed it into the ground now. Don't bother with it, they'll nerf it again and again until it dies out in a few years.
Yes location and Upload Speed does come into play when a modern torrent client tries to pick which seeders to connect to. Users with very high upload speeds will obviously get more connections. This is why it's super hard for users to get Upload on private trackers like RED where a lot of users use 10-20 Gbps seedboxes. Your average 500 mbps connections has no chance against it, you'd get around 1-5% upload of the size of that torrent if you're lucky. There's also a thing where Seedboxes would pick seedboxes that are in the same data centers, racks as them and would cross-seed/leech between themselves first.