While the idea of free is tempting, using "gray market" keys comes with several downsides:
It was a typical Monday morning for John, until he opened his laptop and was greeted by a frustrating message from Avast: "Your subscription has expired." John had been using Avast antivirus software for years, and he was certain that his subscription was still valid. But as he dug deeper, he discovered that his Avast key, specifically the one labeled "2038," had indeed expired. avast key 2038