People search for unblocked VPNs when a network has stopped one working: a school, an office, a hotel or a country-level filter. The useful thing to understand first is that blocking a VPN is easy and blocking it thoroughly is hard, which is why the answer is neither a simple yes nor a simple no.
How a network blocks a VPN in the first place
Three ways, in increasing effort. It can block the known addresses of VPN servers, which providers work around by rotating addresses. It can block the ports and protocols VPNs use, which catches the default settings of most apps. Or it can inspect traffic patterns and identify a tunnel by its shape rather than its destination, which is what national-scale filtering does and which is much harder to evade.
What obfuscation does about it
Several providers offer an obfuscated or stealth mode that disguises VPN traffic as ordinary encrypted web traffic, typically by running it over TCP on port 443, the port everything else on the web uses. Blocking that port would break the internet for everyone on the network, so it is rarely blocked outright. That is why obfuscation works against pattern detection where a simple protocol change does not.
The rules worth knowing before you go looking
A school or workplace network belongs to someone whose acceptable-use policy you have probably agreed to, and getting around it is a matter between you and them rather than a technical question. A country-level filter is a different order of thing and this site is not in a position to advise anyone on the risks of circumventing one. What can be said is that the tool exists, what it does, and that neither is a guarantee.
What this has to do with price
Almost nothing, which is worth saying because the searches around this phrase are full of free apps promising to be unblocked. A free VPN app has the same detection problem as a paid one and less to lose from getting it wrong. The priced index on this site shows what the accountable options cost and what they renew at, and obfuscation, where it exists, is included in the standard plan rather than sold separately.
Questions people ask about unblocked vpns
Why has my VPN stopped working on this network?
Most likely the network is blocking the ports or the server addresses your app is using. Trying a different protocol, or the provider's obfuscated mode, is the usual first step.
Do free VPNs get unblocked more easily?
No. They face the same detection and generally have fewer addresses and less capacity to rotate them.
Is getting around a school or work block against the rules?
Almost certainly against the acceptable-use policy you agreed to. That is a matter between you and the network's owner rather than a technical question.