Update: the Promo Codes have expired ⚠️.
|H7APT5ZTLM45GZV||30 Poké Balls|
The codes work for both Android and iOS players, since the Rewards Portal is a web application that can be used from both platforms. We haven’t tried redeeming them via the in-game store, since redeeming via the Rewards Portal is faster.
The promo codes were spotted through random Facebook advertisement, similar to this one: