Hosting public PS files may be an academic thing. But commercial use wasn't rare. I did PostScript programming for Xerox Research briefly in the late 1980s.

I needed to do batches of mathematical and optical analysis of novel materials synthesized in their labs. This demanded conditional logic, statistical analysis, layout, rasterizing, and archival of results. A single PostScript file did all of the above, with handwritten and template-generated code that ran on the output device, typically a printer. Weird choice of language, maybe; I was a lone computing nerd in a lab of mad chemists. But for rapid prototyping and always having presentable results as the analysis evolved, PostScript ended up being really easy to use.

Looking back 30 years now, I think it was also impressive that it was device independent, readable and commented code, with numeric data embedded like a heredoc. I haven't seen those docs or PostScript code for decades but it wouldn't surprise me if they ran on a PostScript device or viewer today.

Anyways, commercial use of PostScript happened, if mostly internally. At that workplace it was a known and reasonable document format to distribute.