About space advantages

Does white have a space advantage, or is the space advantage the same for both sides?

Is there anything black can do to increase his space advantage or to reduce whites space advantage?

White has more space clearly, but also has a backwards pawn that will be a target. Who ever has less space usually wants to trade off peices. Thats early stages of that game though, lots of stuff can happen.

Which pawn is backwards? Does trading off pieces increase the space on the board?

The backward pawn on c3 isn't really a concern. A "weakness" can only be considered a weakness if it can be exploited (e.g. targeted in a convenient way), which is clearly not the case here. The c3 pawn only serves to bolster White's center.

The term "space" is typically defined as how much control one has over the position. In this case, we can see that White has a huge space advantage, with literally all of his pawns and pieces controlling the center. Black, on the other hand, has no control at all over the center.

Is the problem with this opening mostly that blacks pieces remain constantly cramped despite being in an open position? Normally when one hears about open positions they think about both sides not being cramped, but in this opening black is cramped despite being in a position that is open.

You're confusing terminology. An open position simply refers to a position in which the pawns are not locked up with each other

Is this cramped for black?

Yes. If you need any confirmation of how bad this is check the engine

"Yes" as in it's cramped?

Yes, Black's position is badly cramped. White's pawns dominate the center. To make it worse for Black, White is way ahead in development, so that if Black pushes pawns to fight for space, the position will open up for White's better-developed pieces. Also, White has the bishop pair, which is almost always an advantage, At the master level, White has a won game

So the more black is able to free up the position, the more free the position ends up for white.

Is there a limit to how free a position can be for either side? What would 100% freedom of space look like for white vs 100% freedom of space for both sides? Is it possible for white to get past a point where it can no longer free up its pieces and make them more active, eventually giving time for black to catch up in freeing it's own position?

You're making this way more complicated than it should be. The Black position is bad because of the reasons already given. Period.

If I play as white against this position how much will I have to open up the position before I launch a combination? Is it just a case of constantly keeping the position more and more open until I find a combination?

Everything will depend on the continuation of the game. There is no clear-cut formula as to how to win a chess game

And also, you're better off studying actual chess instead of stressing about this nonsense line that is clearly bad for Black

"So the more black is able to free up the position, the more free the position ends up for white?"

I'm not sure why you're having trouble with this, but here's one more try;  Imagine two armies, White and Black.  The White army has deployed it's troops in a forward position, it's tanks are fully fueled, loaded, and ready to go. The Black army has most of it's troops in the barracks, and the their tanks are put away in the garage. When you open up the road between the two armies, that road is open for both of them. But which army is going to take advantage of that newly open road

Dude you already asked that exact same question in a different thread and people from all different ratings, countries, playing style, even masters and computers have told you in several many different ways all the reasons why it is bad for black. https://www.chess.com/forum/view/chess-openings/has-black-lost-the-game

I don't know why you're so obsessed with that crap position for black, but posting it multiple times is not going to change the fact that it's garbage. Can black win? Sure, if white plays like trash and hangs their queen or something like that. At lower and intermediate levels blunders happen left and right, but statically speaking, all else equal, white will win many more games from that position. You're not going to find a single person who has at least a bit of chess knowledge saying that this is good for black. Black has absolutely no advantages.

"Insanity is doing the same thing over and over again and expecting different results."

But that's because Einstein was too polite to use the word stupidity. No offense...

This is his fourth or fifth thread on this line, actually. If he wanted to improve, he would have abandoned this opening the first time instead of making redundant threads. He's clearly wasting everyone's time by being stubborn in his attempts to apparently get a second opinion. I agree with what you said, this is ridiculous.