Avast’s cloud-based verification systems frequently check license validity. Once a hacked "2050" file is identified, the software will often disable its premium features or force an update that voids the fake license.
Scammers and crack creators exploit this psychological sweet spot, offering .avastlic (Avast license) files modified to show an expiration date of "01.01.2050" or "31.12.2050." avast pro antivirus license file till 2050