Rclone union: use one premium account as the read drive

What is the problem you are having with rclone?

Hey!
Quick question here.
Consider that 1-mega drive is a premium account and 2-mega and 3-mega drive are free accounts.
Is it possible to use 1-mega drive just as the read drive. For example I want to read a file from drive 2-mega with a size of 6GB. Since its a free account I can just read 5GB of the file. I was wondering if its possible so that 1-mega drive reads the file from 2-mega and then I read it from 1-mega drive. That way I could use my premium account from mega without hitting the download quota. The Problem here I guess is that those drives are united via rclone union. See config below.

Thanks!

Rclone Version

rclone v1.55.1

os/type: linux
os/arch: amd64
go/version: go1.16.3
go/linking: static
go/tags: none

Which cloud storage system are you using? (eg Google Drive)

Mega

The rclone config contents

[1-mega]
type = mega
user = ************
pass = ************

[2-mega]
type = mega
user = ************
pass = ************

[3-mega]
type = mega
user = ************
pass = ************

[union-mega]
type = union
upstreams = 1-mega: 2-mega: 3-mega:

[union-mega-crypt]
type = crypt
remote = union-mega:
filename_encryption = standard
directory_name_encryption = true
password = ************

The union policies are:
action_policy = epall
create_policy = epmfs
search_policy = ff

Not really as the union policies are not setup like that.

Union (rclone.org)