Most landscape loaders, also known as industrial loaders regionally and skiploaders in Western states have 3-point down pressure. They're construction duty and in the higher horsepower range except for the older Ford and Massey models. I ran quite a few over the years. Mostly used the down pressure feature as tilt on both sides though it was useful for keeping slight down pressure on the box blade during grading without having to deal with "box float".
Most skips didn't have a PTO, but I did run a Ford in the 80's that had one. A PTO is still available as an option on newer versions.