Secure internet for people who travel frequently or work from coffee shops. Filter the “free” internet connection through a TOR router and protect your network/browsing.
If you are logging into services that can identify you, checking your personal email over a TOR connection, or doing work over a TOR connection, you're putting yourself and your company at risk.
Secondly, with VPN, I first have to connect to the open network in order to activate the VPN. I also need to do it for each device I want to connect (phone, computer, tablet).