If you are a student, teacher, or work for a non-profit organization, many software companies (including GlassWire) offer discounts or free licenses upon verification of your status. It is worth contacting their support team directly.
The best way to support software developers and ensure you receive a legitimate activation code is to purchase a license directly from the software vendor, in this case, GlassWire.
Because official lifetime keys are no longer sold, GitHub repositories claiming to have "working" activation codes are often traps. These repos frequently contain