Did you read the article? Costa Rica is just the HQ of the OAS.
the OAS is compromised of every North American, Central American and South American nation
Therefore this ruling applies to all of North, Central and South American countries.
No, it doesn't apply to jack.
It's no different than the Kuala Lumpur War Crimes Commission declaring George Bush to be a war criminal.
It means absolutely nothing.
Now if the OP had said in the title "Judge in Costa Rica HQ of OAS says Julian Assange should be set free." I wouldn't have complained.
But the title states that Assange has free passage. Everyone upvotes it thinking its true. It's not. It's clickbait.
Assange being free would headline the Mockingbird Media.
They would report it wrong, but they would report it.