I just ordered Mavic Air with DJI care refresh, then joined DJI select. Can I somehow use my DJI select 50% discount on already ordered DJI care refresh?

Sorry CaptainET, the 50% DJI Care discount can only be used once during DJI Select's validity period and it does not apply to the initial DJI Care purchase that is required to qualify for DJI Select membership. Thanks for your understanding.