They’d rather loose genuine Brasil players than loose money from people using Brasil/Argentina vpn

You absolutely can. A good portion of popular trackers have periodicall open signup events. Torrentleech has fairly often open signups. It’s big so it isn’t that easy to build up your ratio when you’re a drop in an ocean, but when you do it can open doors for some more prestigious trackers, although TL should be enough in 99% of cases if you aren’t into some (less popular) niche content. Watch r/opensignups on reddit if it’s still alive and soon enough you’ll be on too many trackers.

Did Mexico pay for that wall?

polishsource (polish general tracker) requires you to only seed 48 hours within a week from downloading and nothing more

Unfortunately it’s not always an option. Switched to fiber and speeds are great but I have to severly limit the amount of connections and active torrents because the POS modem ddoses itself with too many packets and ISP does not allow switching for your own hardware.