No, this is not writing that runs on both gas and electricity. It is writing that mixes artforms to tell stories using multimedia formats. So a collage of images that tells some kind of story rather than illustrated text. And such. Or that's how I read it. Here's their list of 35 markets for hybrid writing, most of which take more traditional works, too.
https://authorspublish.com/35-magazines-publishing-hybrid-writing/