Code in functions.php is exactly the same as you have provided. I just changed members loop sort desc by default.
This line:

I changed to this:

I have tried this snippet in order to sort members by they current balance. Paste the code in functions.php and by editing members loop by changing this code

to this (order by points-desc by default)

The problem is that after I did this the stopped working and also pagination at the end of the member list were gone.

Thank you!

I would like to contribui with a correction. when you want to list your friends sorted by balance it don’t work, it’s need to add a filter in the where clause for that. Here is how a did:

// Adjust WHERE
$BP_User_Query->uid_clauses['where'] = "WHERE um.meta_key = 'mycred_default'";

// comprovamos que no sea un filtro de amistad
if ($BP_User_Query->query_vars['user_id']) {
	$fs = friends_get_friend_user_ids($BP_User_Query->query_vars['user_id']);
	$fs = implode(',',$fs);
	$BP_User_Query->uid_clauses['where'] .= " AND u.ID IN ($fs)";
}

simply append a list of IDs to the where statement. The exact code I used will be a little different, but heres the gist:

$ids_to_include = explode("=", $scope);
$ids_to_include = explode(",",$ids_to_include[1]);
$ids_string = "";

$id_count = 0;
foreach($ids_to_include as $id){
	if($id == ""){
		continue;
	}else{
		if($id_count == 0)
			$ids_string .= " AND (um.user_id = ".$id;
		else
			$ids_string .= " OR um.user_id = ".$id;		
				
		$id_count++;
	}
}
if($ids_string != "")
	$ids_string .= ")";	
		
$BP_User_Query->uid_clauses['where'] .= $ids_string;

Where the initial input of $scope is formatted “include=[id1],[id2],[id3]

The count variable is still a bit off based, but that was actually happening from Gabriel’s code so if I find a fix to that I’ll definitely post here (and here and on the buddypress forum topic im opening here: https://buddypress.org/support/topic/how-to-with-gabey-d-adding-location-filtering/ )