Changelog

Set what your account may spend in each billing period in Settings → Plan and billing. Once the period's spend reaches it, every call that costs money fails with noclick.SpendCapExceeded, its scope "account", until the period resets. What you already have keeps renewing (numbers, domains, storage), and apps keep serving pages until the period reaches twice the cap. Only the account's owner sets or raises it.

Every account has its own invite link, under your balance in the sidebar. When someone you invite starts using NoClick, $2 is added to your balance.