It's stupidly confusing because the regional transfer of 1GB free per month isn't technically part of the "Free Tier" as advertised on this page [0], it's just part of the normal egress pricing model of the individual services [1] [2]. So I guess really this announcement post is misleading/confusing because the regional transfer increase is just a change in the normal pricing model, not the "Free Tier"... but really that's just semantics. AWS really needs to fix the "Free Tier" to make it less confusing.
0: https://aws.amazon.com/free/
1: https://aws.amazon.com/ec2/pricing/on-demand/
2: https://aws.amazon.com/s3/pricing/