With an ISP, you are not paying much for your bandwidth to the Internet. You are paying for connection between your house and their office. Your ISP has to maintain many miles of wire across your city. They also need to maintain equipment that can handle thousands of individual connections across many individual wires.
In comparison, a VPN provider just has a couple of very big connections going into their data center for pushing data in and out.
Plus, you likely have only a few choices of ISP (or only one choice), so your ISP can maintain a very healthy profit margin. With VPN providers, there is a ton of competition, so they have to charge you only a little above actual cost.
With an ISP, you are not paying much for your bandwidth to the Internet. You are paying for connection between your house and their office. Your ISP has to maintain many miles of wire across your city. They also need to maintain equipment that can handle thousands of individual connections across many individual wires.
In comparison, a VPN provider just has a couple of very big connections going into their data center for pushing data in and out.
Plus, you likely have only a few choices of ISP (or only one choice), so your ISP can maintain a very healthy profit margin. With VPN providers, there is a ton of competition, so they have to charge you only a little above actual cost.