No. One payment for Season 1, nothing is charged afterwards. Next season, you choose whether to take it again.

Every premium reward you claimed stays yours for good. The golden name, the banner, the profile card style, the premium showcase, the binder looks and extra binders and the chat style stop when the season ends (your choices and your binders are kept for next time).

No: cosmetics only. No volumes, no gems, no better odds. Every player has the same progression.

Every premium tier you have already reached unlocks at once: nothing is lost.

Link, Stripe's payment service, is the official seller: it handles VAT, the receipt and payment support. OshiCards never sees your card.