I don't think it's a good idea to claim that VPNs increase privacy or security, because... Advertisement companies don't rely on IPs. Now the VPN provider is

I don't think it's a good idea to claim that VPNs increase privacy or security, because... Advertisement companies don't rely on IPs. Now the VPN provider is watching you (and everyone that hacked them, they have deal with, etc.). There is no inherently added security. Tor is specifically made to work around some of these issues, but still every now and then has exits tracking users.