C) Forces Milei to have pragmatic diplomatic relationship with China and Brazil like he despises lmaaaaaao. And if he’s so stupid to try to go out of a major geopolitical active, we can just invite someone else in their place - probably Nigeria - to keep it at 10.
Forces him to have better relations how? If Argentina joins for a few months and does nothing in the meantime what stops Milei from just leaving? Not to mention it would look pretty ridiculous for a group of countries that want to reduce reliance on the Western financial system to simultaneous have a member move in the opposite direction and move towards dollarization. Even assuming Brazil somehow persuaded Milei to adopt the Real instead, or a brics currency board/coin, or a gold standard like libertarians here in the U.S. want, anthing but the Dollar Argentine society is already de factor dolllarizing, unless Lula has a plan to convince Argentine Buinesses to reverse that Brazil will soon suffer a major geopolitical defeat.
As for future enlargement I am suprised there was not more talk of Algeria joining. With hindsight though maybe they just don't want to go from 0 muslim majority countries to suddenly muslim majority countries being the majority of member states.