i dunno how patreon subscription works with vimeo now, but usually, the vimeo vid is just password protected and only patreon subscribers get a password.
Therefore, the number of subscribers isn't gonna indicate video bandwidth, because it's easy to unsubscribe patreon, but still retain access to the vimeo access. May be it is different now - i haven't kept up for a long time in this segment of the world.
Patreon is introducing better integration with things like Discord, I wouldn't be surprised if the vimeo solution is also more sophisticated now (though with youtube it seems to still be just an unlisted video you can share around as you like)
Therefore, the number of subscribers isn't gonna indicate video bandwidth, because it's easy to unsubscribe patreon, but still retain access to the vimeo access. May be it is different now - i haven't kept up for a long time in this segment of the world.