Here's a question:
Could I terminate an AA Explorer award in Brazil (GIG) without a Brazilian Visa and then immediately start a different award ticket with a 4 hour connection?
Example:
EZE - GIG on a oneWorld carrier; 4 hour in-airport layover in GIG
then GIG - LIS on TAP using a star alliance award ticket?
From an immigration/customs perspective, what are the dangers of doing this?