Need more Credits mid-month without changing plans? Buy a top-up from your account page. Top-up Credits:
Never expire. They live in a protected bucket, separate from plan Credits.
Spend last. Your plan's monthly Credits always go first, so purchased Credits survive every renewal.
Coupons redeem on your account page too. A coupon that grants straight Credits lands in the protected bucket (never expires); a coupon that grants a plan behaves like the plan — its Credits expire with the billing period.
Payment is handled by Stripe hosted checkout. Card details never touch Elyum's servers.