Looking at billboard today I noticed the attendance was listed for these shows.

2) Sao Paulo, Brazil
Attendance 55,833
Gross Sales: $5,537,022

3) Buenos Aires, Argentina
Attendance 37,633
Gross Sales: $4,222,698

10)Santiago, Chile
Attendance 46,983
Gross Sales: $3,069,075

15)Rio De Janeiro, Brazil
Attendance 15,529
Gross Sales: $1,718,300

The promoter is T4F-Time For Fun. Attendance matched the promoters designated capacity so all are deemed sell outs. The rank is based on gross revenue.