Psiphon - Key 7 Days Unlimited

Alternatively, perhaps the user is referring to a pirated version or a third-party service that offers Psiphon for a limited time. Wait, but Psiphon also has a paid version called Psiphon Pro? No, I don't think that's correct. Let me verify. Psiphon is actually free for all users, regardless of location. They don't have a Pro version. So where does the "Key 7 Days Unlimited" come into play?