Donationware: you must donate to use it. Not like regular optional donates.
Please speak with a lawyer.
That specific sold binary copy is by definition paidware regardless of source code distribution as there’s a paywall preventing you from accessing that specific distribution of that specific copy.
As for the rest :
Directly from same gpl site.
Does the GPL allow me to require that anyone who receives the software must pay me a fee and/or notify me? (#DoesTheGPLAllowRequireFee)
No. In fact, a requirement like that would make the program nonfree. If people have to pay when they get a copy of a program, or if they have to notify anyone in particular, then the program is not free. See the definition of free software.
The GPL is a free software license, and therefore it permits people to use and even redistribute the software without being required to pay anyone a fee for doing so.
You can charge people a fee to get a copy from you. You can’t require people to pay you when they get a copy from someone else.
If I distribute GPLed software for a fee, am I required to also make it available to the public without a charge? (#DoesTheGPLRequireAvailabilityToPublic)
No. However, if someone pays your fee and gets a copy, the GPL gives them the freedom to release it to the public, with or without a fee. For example, someone could pay your fee, and then put her copy on a web site for the general public.
Does the GPL allow me to distribute copies under a nondisclosure agreement? (#DoesTheGPLAllowNDA)
No. The GPL says that anyone who receives a copy from you has the right to redistribute copies, modified or not. You are not allowed to distribute the work on any more restrictive basis.
If someone asks you to sign an NDA for receiving GPL-covered software copyrighted by the FSF, please inform us immediately by writing to license-violation@fsf.org.
If the violation involves GPL-covered code that has some other copyright holder, please inform that copyright holder, just as you would for any other kind of violation of the GPL.
That’s the same I’m saying. What you quoted just says that you can charge for distributing free software but you cannot force other holders of the software to distribute it asking for a charge.
You as a distributor can charge for what you distribute, that’s it. And it has been done with a lot of free software, like with Linux. That’s why basically Linus changed his License from explicitly free in money to only free as in freedom.
The thing is that free software allows to have a paywall if the distributor wants it. Which has a lot of sense. But does not allow to enforce it to other distributors.
Richard Stallman distributed GNU tools by a price. HIS distribution of GNU tools. At the same time you can also get the GNU tools from idk Debian mirrors (for free).
Free software isn’t free as in money. That’s the whole point. The adoption of Open Source by the “cool” companies (Google, Facebook, Apple, etc.) has tainted the original meaning of free software.
Did you even read my first reply?
It wasn’t about wether or not you can charge. It was about the protections always being granted to the user regardless if they paid the fee. A user could “steal” a copy without paying a fee and still be able to legally distribute it, you wouldn’t even be able to press charges for “theft” because the license grants rights regardless of the means it was accessed.
Also it’s FOSS, not “free software”, they’re not the same thing. Free software could be any software that doesn’t cost money, FOSS is Free(-dom) Open Source Software.
GPL is free (or libre) software. FOSS is a modern term adopted by companies.
