What occurred to me is that after a certain point of rapid excessive human cloning, there are only so many beings "experiencing the bardo" within that time frame that have the karmic opportunity to be human.
I don't understand this. I can't figure out what you are talking about. Sorry.
Son wrote: In other words, even if several bardo beings appear around the forming eggs
Well, that is not actually what is happening. There are no "bardo beings" and they don't approach forming eggs.
Son wrote: if there is a huge excess of human production, some of those beings achieve human birth due to the mere opportunity for it?
The arising of a human form is totally conditional, so yes, of course the number of beings born as humans is exactly the same as the number of humans being born! So, for example, if Earth becomes unihabitable for humans, no beings will be born as human on the Earth. But 'humans on Earth' is a conditional experience. What defines 'human' in Buddhist terms is a constant dissatisfaction with the conditionality of things which is always changing, and that dissatisfaction comes from clinging to things as if they were not changing, and then suffering when they do. So, this experience could happen anywhere the conditions are right.
I just think you took some of what I said in a wrong way.
That is very likely, and also I have trouble grasping what it is you are talking about.
It is helpful to think of the appearance of a being
as similar to a single drop of water that splashes up, out of the waves of a great churning ocean, goes up into the air for a moment and then comes back down, returning to become part of the ocean again. There are not a lot of separate drops of water in the ocean. Only when conditions isolate a part of the ocean does it become a single drop of water.
If we imagine that drop of water as a thinking being, it mistakenly sees itself as a 'self' taking birth into the air, flying around for its whole life (of a split second) and then dying (returning to the sea). The drop of water contains all sorts of elements, salt, hydrogen, some tiny microbes, whatever. The various conditions of the wind, the moon's pull, maybe some earthquake movement, are like karma, all contributing to the opportunity for that drop of water to have it's short little "life", it's moment in the sun, its fifteen minutes of fame. It's existence is
the brief culmination of a series of events taking place simultaneously.
If you take that example and stretch it out to 70 or 90 years, add a few more ingredients, you have a similar situation in which beings are born in as humans, or depending on the conditions, as beings in another realm.
But the point is, it is merely the conditions which arise together as the appearance
of beings in realms which is what we call 'beings in realms'. Outside of that simultaneous arising of conditions, there is no thing that can be called a constant being (atma).
So this is why I don't understand your question. To me it is like asking what happens to all those separate drops of water in the ocean if there are no waves to cause them to splash up into the air. And that makes no sense to me, because there are no separate drops until the splashing waves cause them to take on that appearance
Similarly, there are no beings until the conditions actually become beings.