Any worlds in this galaxy wishing to retain any kind of self-autonomy would have to either lay low and avoid drawing attention to themselves, or “make a deal” with the Alliance, and presumably have something of value to offer them in exchange for being left alone, relatively speaking. Can Creator share how many worlds are surviving this way?

What you are describing is a way that there can be, in effect, a truce where a particular world might be allowed to have its autonomy in exchange for acceptance of the members of the Dark Extraterrestrial Alliance, and providing them with something of value to warrant being left alone in other respects, but this is presuming more a situation where it is a contest between rivals that are more equal in power and potential for causing harm. Among humans and human civilizations, it is often the present occupants of a territory who have the home-ground advantage and it makes it much more difficult for an invading nation to overcome them. While that has happened more than once, there have been more situations where there was a gradual approach and more of a cooperative interchange of cultural or commodity trading to provide at least an incentive to maintain a low level of discord because of the mutual benefit. Many times, of course, such beginnings did not last and there was an ultimate conquering of the new territory and a displacement of the indigenous peoples. Something akin to this has taken place throughout the Milky Way Galaxy with the spread of the Anunnaki through interstellar travel. For one thing, they are slow to act because of their complacency and laziness through long-term self-indulgence and plush lifestyle obtained with little effort on their part. This has given many other worlds time to mount defenses, at least for a time. In the end, when the Anunnaki wish to conquer a world, they will do so and if it seems to be too much trouble or there is a bit more ability to resist than healthy for them, the Anunnaki will destroy that world. This leaves a very bleak picture of existence for those civilizations within the Milky Way Galaxy, because all are a vestige of what they could be without this all-pervasive domination by these parties to evil, who share the spoils and delight in the suffering of the worlds they conquer.