function am2_tv_show_usermeta_fields($user) {
?>
    <h3>Promotor information</h3>
    <table class="form-table">
        <tr>
            <th><label for="am2_promotor_type">Type</label></th>
            <td>
                <?php
                    $selected_option = get_the_author_meta( 'am2_promotor_type', $user->ID );
                 ?>
                <select name="am2_promotor_type" id="am2_promotor_type">
                    <option selected value="">Please select something...</option>
                    <option value="basic" <?php if($selected_option == 'basic'){ echo 'selected'; } ?> >Basic</option>
                    <option value="featured" <?php if($selected_option == 'featured'){ echo 'selected'; } ?> >Featured</option>
                    <option value="premium" <?php if($selected_option == 'premium'){ echo 'selected'; } ?> >Premium</option>
                </select>
                <span class="description">Please select promotor type.</span>
            </td>
        </tr>
</table>
<?php
}

function am2_tv_update_usermeta_fields( $user_id ) {

    if ( !current_user_can( 'administrator', $user_id ) ){
        return false;
    }

    update_usermeta( $user_id, 'am2_promotor_type', $_POST['am2_promotor_type'] );
}


add_action( 'show_user_profile', 'am2_tv_show_usermeta_fields', 10, 2 );
add_action( 'personal_options_update', 'am2_tv_update_usermeta_fields', 10, 2 );
add_action( 'edit_user_profile_update', 'am2_tv_update_usermeta_fields', 10, 2 );
add_action( 'edit_user_profile', 'am2_tv_show_usermeta_fields', 10, 2 );

 Source