Every month, players are given a choice between one of several items worth up to 2000 Station Cash. This item must be selected on a monthly basis, as benefits do not carry over from month to month. While the net amount of rewards should be functionally identical, it will mean fewer options about what you acquire on a monthly basis, especially as Player Studio items are listed as exclusions from the list. If you're unhappy with the change, you've got time to say so, as the change is not going into effect until February 3rd.
[Thanks to Balsbigbrother for the tip!]