The t-shirts will be given at the gates. All the Red Bulls fans in the away supporters' section will not be given these t-shirts. Maybe the fans sitting outside that section will get one, unless, hopefully the security people are told not to give them to people wearing red or Red Bulls.
The shirts are not on the seats across the stadium like Red Bull did at their game which was stupid leading to the t-shirts being thrown onto the field because they put the shirts in the away section and nearby where NYCFC fans were known to be sitting. Stupid.
NYCFC fans were throwing all sorts of things on the field and the lower stands that day - tshirts, drinks, debris. The fact that the t-shirts were near the away supporters should not be a reason for said supporters to take them and throw them on the field.