I think that was just for the stock photo to show the equipment off. Pins could be used for rack pulls, the yellow straps are TRX straps I think. I've only been to Iron Athletics once, I'm not a member. I just wanted to give the owner props for being very cool. Plus, I legit like the facility.
Dude, it's brutal especially if you add an incline. I remember the humps in boots camp being rough, but not bad. Adding an incline with 15kg on my back had me breathing pretty hard.
It's so simple to do though. We'll see how effective it is.