Just wanted to say at least for the non-creative apps I am already doing that at https://azul.rs

But its a lot harder if you want to maintain at least some level of quality. For example, your PDF export exports texts as paths and correct PDF encoding and font subsetting took months of trial and error (I maintain the printpdf crate).

So you have to actually use your apps, test extensively, etc. - don‘t underestimate the effort required for QA and testing.