1.3 — Payment & Billing 1.3.1 Adding your payment method Adding your payment method 1.3.1   KEY   billing TODO — write this page. 1.3.2 Updating your payment profile (card, billing address) Updating your payment profile (card, billing address) 1.3.2   billing TODO — write this page. 1.3.3 Understanding your billing cycle and invoices Understanding your billing cycle and invoices 1.3.3   billing TODO — write this page. 1.3.4 Upgrading or downgrading your subscription Upgrading or downgrading your subscription 1.3.4   billing TODO — write this page. 1.3.5 Cancelling your subscription Cancelling your subscription 1.3.5   billing TODO — write this page.