Yours is the first deployment I've seen of that term. I prefer to use the term "resistant training" and many people say "live" training.
In yoseikan, we had shite randori, with set attacks and defenses, jiyu randori, with completely free attacks, and chikara randori, meaning free attacks and defenses, with uke giving continuous, strong follow up attacks if nage does not effect a decisive response in the first instant of the attack. If the attacker doesn't have to fall, he does not and continues the attack. This often went to the ground and newaza, frequently ending in a choke or strangulation. And remember that the yoseikan randori was full of sutemi waza, multiple opponents, bokken, padded pvc swords, knives, bo, etc. I never saw anyone use throwing stars or the claw hands, but most everything else.
It was cooperative, yet when two people were grappling on the ground, they were cooperating by giving the partner a tough opponent intent on choking him out or submitting him. It was basically the same as UFC but without bloodying each other up too much. We placed atemi but generally didn't strike each other heavily. And if you didn't throw someone who punched at you, he might follow up with a foot sweep and attempt to apply a joint lock of a wide variety.
What we cooperated in was a universal commitment to a powerful, meaningful attack allowing nage to develop first-instant throwing or joint-locking--not meaning that the joint is locked in the first instant, but the lead into the lock is established in the first instant, creating kuzushi and control for nage. It was intense and dangerous. And it took cooperative commitment to that danger, courage and calmness to move in it at high speed with lots of people and weapons, and commitment to the well-being of your partner, with the rule of never doing more than necessary to stop a violent person--but stopping him decisively.
Cooperative or uncooperative, whatever you would call it, that was real aikido and, as far as I'm concerned, the only meaningful progression to develop true technique. The internal power considerations are another matter.