myCRED Banking: Max Balance Limit for Recurring Payouts

/**
 * Adjust Eligeble Users
 * Removes users that have 100 points or higher as balance from gaining a recurring payout.
 * @requires myCRED 1.6 or higher
 * @version 1.0
 */
add_filter( 'mycred_get_eligeble_users', 'mycred_pro_adjust_bank_eligeble_users', 10, 2 );
function mycred_pro_adjust_bank_eligeble_users( $users, $banking ) {

    // Only applicable for "Recurring Payouts"
    if ( $banking->id != 'payouts' ) return $users;

    // No use to do anything if there are no eligeble users
    if ( empty( $users ) ) return $users;

    // First we need to get the correct balance key
    $balance_key = $banking->mycred_type;
    if ( is_multisite() && $GLOBALS['blog_id'] > 1 && ! $banking->core->use_central_logging )
        $balance_key .= '_' . $GLOBALS['blog_id'];

    // For our SQL query we need to take into account if we are using decimals
    $balance_format = '%d';
    if ( isset( $banking->core->format['decimals'] ) && $banking->core->format['decimals'] > 0 )
        $balance_format = 'CAST( %f AS DECIMAL( 10, ' . $banking->core->format['decimals'] . ' ) )';

    global $wpdb;

    // Remove all users that have 100 points or more
    $max = 100;

    // Next we get all ineligible users
    $ineligible_user_ids = $wpdb->get_col( $wpdb->prepare( "
        SELECT DISTINCT user_id
        FROM {$wpdb->usermeta}
        WHERE meta_key = %s
        AND meta_value >= {$balance_format};", $balance_key, $max ) );

    // If we have results, remove them from $users
    if ( ! empty( $ineligible_user_ids ) ) {
        $new_user_list = array();
        foreach ( $users as $user_id ) {
            if ( ! in_array( $user_id, $ineligible_user_ids ) )
                $new_user_list[] = $user_id;
        }
        $users = $new_user_list;
    }

    // Return for processing
    return $users;

}