In fact, you should feel no shame about actively preserving your particular copy of those games. You never know who has a release that has not been preserved.
Piracy is preservation. The only reason works are preserved tomorrow, is because somebody is pirating them today.
You can't (practically) though, they all require internet activation and are very hard for a layperson to crack (if one isn't available for download)... they're effectively coasters unless deep skill and time are invested in the cracking (which is usually the case but maybe not always).
Piracy is preservation. The only reason works are preserved tomorrow, is because somebody is pirating them today.