Anyone who has played Rocket League online before the launch of
free-to-play will be rewarded with Legacy status, which includes:
In addition, if you've played online before July 21, 2020, you will also
receive the Faded Cosmos Boost. Items will be granted beginning with the
game update on September 16, 2021.
For more info check out this blog post:
Rocket League Free to Play Arrives September 23
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