It certainly can be! Using an offshore VPN service makes it harder for your government or police force to serve a warrant or subpoena requiring the provider to hand over the logs it has, or even to begin logging if it doesn't already. However, you shouldn't rely on this to protect yourself in this hyper-connected world. It's more important to use an offshore VPN if you live somewhere with mandatory data retention laws, seeing as it'll allow you to pick a VPN based in a country where there is no requirement to keep logs.