Remove the "Powered by Ghost" Tag from the Newsletter Portal (Ghost Blog)

Remove the "Powered by Ghost" tag from Ghost Portal

In Settings → Code Injection, add this text to the "Site footer":

<script>
window.onload = function () {
    let portal = document.getElementById("ghost-portal-root");
    const interval = setInterval(() => {
        let frame = portal.querySelector('[title="portal-popup"]');
        if (frame !== null) {
            const styleElement = document.createElement("style");
            styleElement.innerHTML = `.gh-portal-powered { display: none; }`;
            frame.contentDocument.head.appendChild(styleElement);
        } else {
            frame = null
        }
    }, 300)
}
</script>