I believe normal donation options would be sufficient. For instance, 'testdisk' saved me a lot of time. I was so happy with it that donated the same day. Author made effort to make donation system fast and easy.
I understand that there's a difference between usage of LGPL based software and making project based on it. When it becomes derivative project, it's covered with section 2 of the license rather than section 6.
The situation is weird and you know it. BenF closed his source after 3.11. Of course he can do this as an author. Now we got situation when rimidalv007 contributed his time and knowledge to integrate new procedures into LGPL licensed software. As ricoreyes
said, it would be great if BenF open-sourced 3.64. Well... Actually if BenF would like to use patch, his firmware would have to become open-source again. Right?
3.64 is closed-source. I don't know what if binary file got patched. It doesn't include any source to it. I don't even know if it was licensed. Was it?
But hey, what do I know, let's drop this