In a bizarre twist, Adobe published a support document telling users how to keep using their legally purchased CS3 without online activation. This created a legal gray area that forums like VideoHelp and OldVersion.com exploited. The "free download" isn't free because Adobe is generous. It is free because the software has become abandonware —a digital orphan.
The Truth About Adobe Premiere Pro CS3: Downloads and Modern Alternatives Adobe Premiere Pro CS3 Multi-language Free Download