EmailVanish, a disposable email service with a paid tier

Visitors get an instant throwaway email address and watch mail arrive in real time; addresses expire after ten minutes. A Premium tier at $1.99 a month keeps chosen addresses receiving for as long as the subscription lasts, with a dashboard, kept inboxes and an admin page.

Tens of thousands of inbound messages a day arrive through Mailgun. Stripe subscriptions are live. The domain is on none of the major public disposable-email blocklists, which is the whole value of a service like this.

All of that arrived with no advertising at all.