The official policy of the Internet Archive is to respect copyright. However, because the Archive relies on user uploads (under "Community Video"), copyrighted material often slips through. Many uploads of the film exist under a murky claim of "Fair Use" or are simply taken down via DMCA notice, only to be re-uploaded the next week.
But for a specific generation of film buffs, nostalgists, and digital archivists, the movie exists in a very specific place: not on Disney+, not on a Blu-ray shelf, but on the . 500 Days Of Summer Internet Archive
Searching for is a digital archeological dig. You might find a legitimate copy that has fallen into the public domain in a specific country, or you might find a fan upload. The digital preservation community argues that if a film is not available to stream or purchase for a reasonable price in a certain region, archiving it is an act of cultural rescue. The official policy of the Internet Archive is