> oxylabs (NordVPN), luminati (Holla)

Wow that's misleading.

Oxylabs and Luminati are both residential proxy networks.

Hola is a VPN that sells access to Luminati.

NordVPN is a VPN that does not sell access to anyone. It is not sending anyone else's data through your connection. There's an accusation that it shares ownership with Oxylabs, and that's about it. NordVPN might be buying, not selling, residential proxy access from someone, but it's very unclear if that's true and either way doesn't have a negative impact on their customers.