Notice there is No legitimate software company offers a lifetime subscription till 2050 because maintaining server infrastructure, wireguard protocols, and support staff costs money. If a seller on eBay offers a “2050 key,” they likely generated it using a stolen credit card or a compromised corporate key.
Avast’s servers verify licenses in real-time. Even if a modified file shows "2050" on your screen, the software will eventually check in with the Avast backend , realize the key is unauthorized, and ban the license . Why You Should Avoid These Codes
Sites like Newegg, Amazon, or Best Buy sometimes sell physical cards with Avast codes. If the price is $5 for a "5-year key," it is stolen.