1) VPNs are not allowed in Buzzen
2) VPNs vary wildly. Some limit bandwidth, some limit the amount of countries you can relay from, some do not allow multiple browser tabs to be open. Almost all of them require a monthly subscription.
If you're worried about security, there's better steps you can take before resorting to a VPN such as:
1) Strong security suite (anti-virus, firewall, adware/malware detection, etc)
2) Constant cleaning of cookies and history (optimally at the end of every session)
3) Logging off and closing browsers after transacting on a website
4) Opting out of unnecessary cookies (or not automatically opting in)
5) Limiting use of automated apps or extensions except when needed
For reference, I haven't had any negative issues in a long time and I use the following:
Opera Browser
Ultimate Ad Blocker extension
Avira Anti-Virus
Proton VPN (for localized country content)