On the change, Yep, I would agree. On the charging more for originally paid for tickets, I think that's the promoter's issue & not the people who bought tickets in good faith already
But as our friend Eduardo said "this is Brazil" lets hope this isn't the case. Quite selfishly it doesn't really make a huge difference to me because I had the most expensive tickets anyway.
On the issue of change, it may be that the promoters have not sold many tickets and now want to switch to a smaller place because the rent of the place is smaller too.
At night...I hear the darkness breathe...I sense the quiet despair...Listen to the silence...At night...Someone has to be there...