Using e.g. a Slovenian VPN won't help much if you're still accessing sites within the five eyes. You're still using HTTPS presumably.. the only thing VPNs would

Using e.g. a Slovenian VPN won't help much if you're still accessing sites within the five eyes. You're still using HTTPS presumably.. the only thing VPNs would hide is what websites you visit, and if those are hosted in the US they can scoop up your traffic straight from the beam splitter. The real danger is IC getting at the data in your accounts, which VPNs won't help with.