The fat tastes good.
There is usually still some meat attached.
You should get it pretty cheap though since probably they just throw it out.
I would ask them if they have any beef fat available. If so, they'd ask me how much I want and I'd for example
say 5 lbs and they'd wrap it up.
Make sure to ask the price first per pound. You don't want to pay much for it.
Those Mongolians eat Sheep's tail fat, big slices of it between meats and onions and liver on those skewers

"It contains lots of vitamins!"
but you dont know why?
Tell me, if Thor had eaten more food than he did would he have lifted more?
You can only get so much benefit from the food you eat, the food you eat now really only gets used tomorrow unless you eat simple sugars
Eating "tons" makes you hold even more water, plus it increases waist circumference

The bigger and more bloated you are the stronger you often are. More unhealthy too of course. We have this disgusting 21 year old strongman at the gym, he's always bragging about how much food he is eating, "just ate two pizzas with 2 liters of whole milk, letting it digest a bit and then go to the buffet before starting lifting." "I never start lifting unless I've had at least 5K calories in me." He doesn't appear to know how disgusting he looks, fat as fuck with nasty acne. He probably doesn't understand that almost no one would want that strength if it came with that abomination of a body. But let's let everyone pursue whatever dream they have...

I personally would get as big/fat as Thor if it made me deadlift the most in history, 100%. It's dangerous but it's history too and he can leverage that into actual money. Hall didn't really acknowledge Thor's 501kg due to them weighing the plates themselves, haven't seen if he's commented now...