David Revoy creates the series entirely with free software, such as Krita and Inkscape, making the Krita source files for each image available for download. All artwork is made available under the Creative Commons Attribution 4.0 license. He explicitly encourages fanart and other derivative works.

They sell books which is kind of a tradeoff, but its more like a way to support the artist. Because the digital copies are free, anyone can read or print the book by themselves. On their shop where they sell their books they give you 3 options – soft cover, hard cover, or download it as a PDF. You can see they sell it as a PDF while you can already get that for free, it shows that its more like a donation to support the artist.

But I’d only give it 3 blocks cause they sell other stuff too, like t-shirts, stickers etc.

Their digital stuff seems to be trade-free, but of course they sell stuff like tshirts, stickers, comic books. However, since you can still read the comic books online and download their artwork, then I would give them 2 blocks.

Emi yoo fun awọn bulọọki 3, niwọn igba ti wọn funni ni awọn apanilẹrin wọn bi laisi iṣowo, sibẹsibẹ wọn tun sopọ si ile itaja kan, facebook ati oju-iwe twitter (awọn nẹtiwọki ti o da lori iṣowo). Ati ipolowo si ile itaja wọn jẹ pupọ “ni oju rẹ”: https://www.directory.trade-free.org/wp-content/uploads/2020/12/Pasted.jpg