Wellll.... I don't know if it's meaty at all. Nothing in there actually is revealing: yeah, they do eye-tracking. So does every serious outfit. They store all t

Wellll.... I don't know if it's meaty at all. Nothing in there actually is revealing: yeah, they do eye-tracking. So does every serious outfit. They store all the data they create: yes, it's nearly free to do that (relatively speaking), and I'd be surprised if they didn't do it (nearly all graph algorithms they should employ will benefit from more data to train/test); they're creating Hyper-PHP--great etc, but you'd really think twice before creating your own site on PHP, so it's a non-issue for me at least. Bonus: I'm also certain they have their own front-end engineering which is speeding up javascript. Nearly everyone else does, and getting that 0.5s page-load will certainly need this boost.