Earlier quoted context omitted.
"when you purchase GPL" .. sure. But there's nothing to force me to provide you with the software until you've given me money. Even if I used someone else's GPL'ed software in my software, I can simply not distribute it until someone gives me $100,000. "When you purchase access to an open-data paper" Some provisos first. Some papers are gratis, and don't require being purchased. (Eg, author-pays papers.) Also, I thin…
> I can simply not distribute it Of course, you haven't infringed on anyone's freedom yet, there are no users. I guess the thing is if you massively overcharge without providing any corresponding service of value the first person that purchases it has the option to throw the source code up on the internet and it can be forked. I guess you also have to find a buyer that is willing to pay you the large sum while also k…
While, to go back to my first comment:
"If you have useful data, the free software principles say that you might as well charge a lot of money for it, which is not what most chemists and biologists think of in discussion of data openness."