Not being able to use VPN with certain providers really put me off. What is the reason that I pay so much money if they blacklist the vpn's ips I use because my

Not being able to use VPN with certain providers really put me off. What is the reason that I pay so much money if they blacklist the vpn's ips I use because my network is not secure enough? I was not even trying to go through a different country or anything, just the same country I reside and I made my account.