> You don't really require to give the source code unless the purchased person asks for the source.
I think you're mixing mutually exclusive options. As I understand it, GPL requires you to either provide source code up-front on the same terms as the binaries (I think the relevant phrase in GPLv3 is "equivalent access"), or alternatively provide a written offer to provide the source code to anyone who requests it. The reason the offer must be to anyone is that your customers can distribute that offer with the binaries in lieu of source code. That way, they have the ability to redistribute/"convey" the software in a compliant way even though they don't have source code.
> GPL v2 requires you to produce the source code in CD/Floppy (or like media)
Unless I'm missing something, GPLv2 just says "a medium customarily used for software interchange", not specifying that it must be any sort of disk/tape.
I think you're mixing mutually exclusive options. As I understand it, GPL requires you to either provide source code up-front on the same terms as the binaries (I think the relevant phrase in GPLv3 is "equivalent access"), or alternatively provide a written offer to provide the source code to anyone who requests it. The reason the offer must be to anyone is that your customers can distribute that offer with the binaries in lieu of source code. That way, they have the ability to redistribute/"convey" the software in a compliant way even though they don't have source code.
> GPL v2 requires you to produce the source code in CD/Floppy (or like media)
Unless I'm missing something, GPLv2 just says "a medium customarily used for software interchange", not specifying that it must be any sort of disk/tape.