https://developers.cloudflare.com/billing/preview-services/
Preview services · Cloudflare Billing docs
Contracted customers can try certain products and features for 30 days.
cloudflare billing docs
https://developers.cloudflare.com/billing/resolve-cannot-remove-payment-method/
Resolve "cannot remove payment method" · Cloudflare Billing docs
This article will help if you are receiving an error that mentions one of the following errors when attempting to remove a payment method:
cloudflare billing docscannot