Does Adobe Stock (or the algorithm) not like film photography?

The combination of old film stock and poor scan quality puts your photos out of the running, both visually & technically. The amount of effort needed to correct all the problems & make this a commercially successful digital asset probably outweighs its potential sales value. 

Keep the scans for personal use.  Submit 20+ megapixel photos to Stock.

Read your Contributor User Guide for more tips on what's expected.

• https://helpx.adobe.com/stock/contributor/help/reasons-for-content-rejection.html
• https://helpx.adobe.com/stock/contributor/help/quality-and-technical-issues.html
• https://helpx.adobe.com/stock/contributor/user-guide.html/stock/contributor/help/photography-illustrations.ug.html
• https://helpx.adobe.com/stock/contributor/help/how-to-submit-distinct-content.html
• Model/Property Releases:
  https://helpx.adobe.com/stock/contributor/help/model-release.html
  https://helpx.adobe.com/stock/contributor/help/property-release.html
  
  

 Hope that helps. 

Old film scans are rarely suitable for stock because they just don't meet the current quality standards of digital photography. Your scan is underexposed, noisy and not sharply focused. 

The photo is beautiful but, the quality is very poor. 
The frame needs to be removed. The spots in the sky removed. The exposure needs correction. The noise needs to be reduced. The colors need correction. Here an example:
Screenshot 2025-12-08 at 10.59.05 PM-Edit.jpg

To dark. And I assume you submitted the scan without the film edges. But yes, Adobe wants photographs. What are you using to scan your images?

Untitled-1.jpg