ListFolder limit?

I don't see where there is an actual limit that you can set, it seems to be arbitrary. That said, basically when you make the initial post to list_folder that will return some number of entities along with a cursor value and a has_more value. Think of the cursor as a page value that already knows the user being queried and other information so all you have to post to list_folder/continue all you have to send it is the cursor value. That will return the next page of entities along with another cursor for the page after that, and so on until cursor is returned empty.  Not sure what language you are using but I'm doing it like this in PHP.

$first_page = true;

$api = $first_page ? 'https://api.dropboxapi.com/2/files/list_folder' : 'https://api.dropboxapi.com/2/files/list_folder/continue';

do {

if ($first_page) {

    $data = json_encode(array(
        "path" => "",
        "recursive" => true,
        "include_media_info" => false,
        "include_deleted" => true,
        "include_has_explicit_shared_members" => false,
    ));

    $first_page = false;

} else {

     $data = json_encode(array(
        'cursor' => $cursor
    ));

}

... Make the call out to the endpoint and get the response ($response);

} while {$response->has_more);

After the first call out $first_page is set to false so if $response->has_more returns 1 the cursor is sent page requesting the next page.  Once you hit the end $response->has_more will be empty.

Hope that helps.