There are freeware files that will just clean the PPV area, it works with both the freeware activation files and on a subscription card. Usually, it's because the software is outdated or no longer has any commercial value. Sometimes, it's released out of a personal grudge or business dispute with the author. Some freeware are one commercial card's code dumped and then released by their competition, intended to compromise their cards safety. Some freeware are written by independent hackers who just wants to share their discoveries with others.
Many freeware are copied or base on previous freeware or parts of previous freeware files.
It is conceivable that DirecTV will release files on the internet to cause intentional damage to your card, as an ECM method. Yes to some files and no to others. It's outright dangerous to use certain files as they have been targeted by previous ECMs. If you use these files and your card is exposed to the ECM packets, it will get damaged. The age of the file is very important.