In comments it's very rare because and it's not rendered on the website. Usually screenshots, e.g. to show that an article isn't readable on a mobile device. A

In comments it's very rare because and it's not rendered on the website. Usually screenshots, e.g. to show that an article isn't readable on a mobile device. As direct submission I see 1-2 per week, e.g. the XKCD comics, though I can't remember any getting any traction or making it to the frontpage.