Minimum Balance Requirement for mycred_link

/**
 * Replace the mycred_link shortcode
 * @version 1.0
 */
add_action( 'mycred_init', 'mycredpro_replace_link_click_shortcode', 990 );
function mycredpro_replace_link_click_shortcode() {

    remove_shortcode( 'mycred_link' );
    add_shortcode( 'mycred_link', 'mycredpro_render_shortcode_link' );

}

/**
 * Before showing the mycred_link shortcode, make sure the user
 * can afford to click on it.
 * @version 1.0
 */
function mycredpro_render_shortcode_link( $atts, $content = '' ) {

    extract( shortcode_atts( array( 'amount' => 0, 'ctype' => 'mycred_default' ), $atts ) );

    if ( ! is_user_logged_in() ) return '';

    $mycred = mycred( $ctype );

    $balance = $mycred->get_users_balance( get_current_user_id(), $ctype );

    // Do not show anything if a user can not afford to click
    if ( $balance < abs( $amount ) ) return '';

    // Let myCRED generate the shortcode for us
    return mycred_render_shortcode_link( $atts, $content );

}