Amazon increases free shipping threshold for non-Prime members in some regions

Amazon has raised the minimum order value for free shipping from $25 to $35 for non-Prime members in some areas.
The change is being tested randomly by zip code and does not affect Prime members.
Amazon has adjusted the free shipping minimum multiple times in the past.
The move is aimed at pushing more customers to join Prime and cut costs amid slowing sales.
Some non-Prime accounts still have a $25 minimum, while others now have a $35 minimum.