

Using a VPN and letting the VPN company see some info is better than letting your ISP see the same info. VPN doesn't help or hurt Tor browser, and VPN helps protect all of the non-Tor traffic (services, cron jobs, other apps) coming out of your system while you're using Tor browser (and after you stop using Tor browser). Both VPN and Tor/onion really protect only the data in motion if the data content reveals your private info, the destination server gets your private info. Tor/onion does same, but only for Tor browser traffic also adds more hops to make it harder to trace back from the destination server to your original IP address, and also mostly forces you into using good browser settings. VPN mainly protects your traffic from other devices on same LAN, from router, and from ISP. That said, neither VPN nor Tor/onion are magic silver bullets that make you safe and anonymous. So leave the VPN running 24/365, even while you're using Tor.
