[zozbot234]

Why would these actors want to publish on Substack in the first place? They have their own platforms already. Alt-right content is highly "meme" based (e.g. the whole thing with frogs and 'Kekistan', or the Qanon LARPing), it doesn't do well on a platform focused on long-form texts with serious intellectual interest.

[meowface]

I'm not trying to promote their blog and am not a fan of it and won't link it, but I know of at least one Substack blog by one such actor who indeed makes their blog highly meme-based. The fact that you can insert arbitrary inline images in blog posts and write whatever text you want near them is pretty much all you need.

[wpietri]

One obvious answer is revenue. Getting money in is a real struggle for extremists, who tend to get banned from traditional platforms. Think of it as like paying membership dues.