The designer said it will discount players who spent credits on the underlying excessive costs, restoring the Rocket League Items contrast between the old and new costs to their Rocket League accounts.
"For instance, buyers of Crimson Fennec will get 500 Credits back today, as a Crimson Fennec currently costs 700 rather than 1200 Credits," Psyonix composes. "This value change is a one-time just function, and just applies to buys made between December 4 and December 11."
The thing shop update shows up close by a minor fix that fixes a couple of waiting bugs. You lolga can peruse the notes for that update here.