To be fair, I don't really have a need for these things anymore, but I was tired of seeing piles of branches everywhere. Specially because we rent a 4000 sq ft shop to a company that manufacture of injection moulds for plastics and they have a lot of people coming in and out, some high end clients, like BMW, Mercedes, and so on. So those piles look really bad and we want to keep everything nice and clean.
I mostly burn this stuff on a small parlor stove I have in my workshop. Works great and it's very easy to pour a handful of these things there. My dad also made a mini kebab grill that uses wood/coal instead of electric elements. This small sticks are great for that as it fits just perfectly. The small sticks are also great to start bigger fires with.
Up until 5 or so ago, we used something to heat water with that I can't find the name in English. It's basically a 100 liter boiler on top of a very short small stove. It heated water really fast but was always a pain to go back and forth to get wood and feed it, specially on the colder days. Between me and my dad, we used to cut thousands and thousands of broken pallets that were no good anymore for the industry. We got those for free. The cut pieces couldn't be longer than a foot or the door wouldn't close. This branch chopper I know have, would be perfect for that and I'm we would burn loads and loads of these small sticks.
We now have two solar panels on the terrace and a 300 liter tank with electric backup on the laundry room. Absolutely the best thing we ever done. The water is always between 50ºC and 70ºC without even needed the electric backup.
These branch loggers won't replace the log splitter or split wood. It's just a way to repurpose the branches. People still cut/split/burn loads and loads of wood.
RemetCNC is a big company that makes these branch loggers. An actual legit company, not some redneck on the backyard like most videos look like.

They make gas, diesel and PTO powered units. The biggest PTO powered one will require at least 90 HP but will cut material up to 6.5" and throw out pieces about a foot long. They also make the standard wood chippers and some badass PTO forestry mulchers for tractors.
Here is the link if any of you are interested:
Rębak WOM RP-200 - Rębak Walcowy Podwieszany do Ciągnika
And here is a picture of the older water heater that we used. Again, I'm not sure of the name in English, maybe wood fired water heater?