There are W3C recommendations on photosensitive epilepsy; the key recommendation is to keep the flash rate of any large area of the screen below 3Hz. This recommendation follows broadcast television standards. The flash rate on this site is 2Hz, so it poses a relatively low risk of triggering PSE.

https://www.w3.org/TR/WCAG20/#general-thresholddef

Sounds like something our OS should be solving

Haha concerns of accessibility? No... that's like an after thought same with using Aria, good contrast, tab-index, no-script option, etc...

Yeah, it's hilarious but photosensitive epileptics should beware before fiddling with the slider at the bottom.

He could have left off that last one ("hardest sale") and avoided the issue, but I think most people aren't aware of the issue.

I read this comment before looking at the site, but I still wasn't expecting that. It's bad.

SUDEP is a thing. Come on people: https://en.wikipedia.org/wiki/Sudden_unexpected_death_in_epi...