$.mobile.fixedToolbars.show() does nothing
$('#no_thanks').tap(function() {
    $('#earn_more').slideUp(function() {
        $(this).trigger('updatelayout');
    });
});

<div data-role="page" id="home" class="main_content">
    <div data-theme="b" data-role="header" role="banner">
        <h1 class="ui-title">My app</h1>
    </div>
    <div data-role="content">
        <p class="app_notice" id="earn_more">
            Tell us more about yourself

                <a href="#" data-role="button" data-theme="d" data-icon="delete" data-iconpos="right" id="no_thanks">No thanks</a>
        </p>

    </div>
    <div data-role="footer" data-theme="c" data-position="fixed" class="footer">
        <div data-role="navbar">
            <ul>
                <li><a href="#" class="ui-btn-active">Home</a></li>
            </ul>
        </div>
    </div>
</div>