
Cuba is in the “partner state” category, not a full member state, for which it has been applying. The category was created about 2 months before this. The partner state category furnishes very few benefits. It is basically being a “candidate” allegedly in the running, like being in a later stage of an interview.
Edit: I should note that Brazil fairly publicly blocked Venezuela from becoming a member of any kind in just the last year, citing their elections, i.e. the most lib PR possible.
Yes, I’m still optimistic for BRICS and want to see it succeed with more members! It would be great to establish stronger lines of trade, hopefully leading to US embargo-proof shipping routes.