seutaendingseogeun maejinijiman jijeongseogeun ajik isseo.

은/는 is being used here to mark each noun as a topic and to create a contrast.

So the sentence is setting up a comparison:

• 스탠딩석은 = as for standing tickets/seats
• 지정석은 = as for reserved seats

This gives the feeling of:

• Standing tickets are sold out, but reserved seats are still available.

Using 은/는 twice is very common when contrasting two things. It is similar to saying as for A..., but as for B... in English.

매진이지만 breaks down like this:

• 매진 = sold out
• 이다 = to be
• -지만 = but / although

So:

• 매진이다 = to be sold out
• 매진이지만 = it is sold out, but...

Because 매진 is a noun, it combines with 이다, and then -지만 attaches to that.

A similar pattern would be:

• 학생이지만 = although he/she is a student
• 문제지만 = although it is a problem

Here, 매진이지만 connects the first clause to the second clause with contrast.

있어 is the casual, informal form of 있다.

Speech levels:

• 있어 = casual
• 있어요 = polite
• 있습니다 = formal

So this sentence sounds like something you might say to a friend or in relaxed conversation.

The same sentence in a more polite style would be:

• 스탠딩석은 매진이지만 지정석은 아직 있어요.

And in a more formal/customer-service style:

• 스탠딩석은 매진이지만 지정석은 아직 있습니다.

In Korean, it is very common to omit words that are obvious from context.

Here, 있어 literally means there is / exists / have, but in context it means something like:

• there are still some
• they are still available
• there are still reserved seats/tickets left

The omitted idea is 지정석 tickets/seats. Korean often leaves that unstated if it is already clear.

So 지정석은 아직 있어 really means:

• As for reserved seats, there are still some available.

석 means seat or seating.

It is often used in ticketing or venue contexts:

• 지정석 = assigned/reserved seat
• 자유석 = unreserved seating
• 입석 = standing room / standing ticket

So 스탠딩석 is a category name meaning something like standing section or standing tickets.

Even though standing seat sounds strange in English, Korean ticket categories often use -석 broadly for seating/ticket types.

No. 스탠딩 is a loanword from English standing, written in Korean pronunciation. Then it combines with 석.

So:

• 스탠딩 = standing
• 석 = seat / seating category

This is very common in Korean, especially for concerts, events, shopping, and technology. Korean frequently combines English-based loanwords with native Korean or Sino-Korean elements.

아직 means still or yet, depending on the sentence.

In this sentence, it means still:

• 지정석은 아직 있어 = reserved seats are still available

The nuance is that they have not sold out yet.

Compare:

• 아직 있어 = still have / still available
• 아직 없어 = still don’t have / still unavailable
• 아직 안 왔어 = hasn’t come yet

So here 아직 emphasizes that, unlike the standing tickets, the reserved seats remain available at this point.

Sometimes, yes, but the nuance changes.

• 매진이다 specifically means sold out
• 없다 just means there is none / there aren’t any

So:

• 스탠딩석은 매진이지만... = the standing tickets have sold out
• 스탠딩석은 없어... = there aren’t any standing tickets

Both may be acceptable in some contexts, but 매진 is more precise and more natural when talking about tickets being sold out through sales.

Because Korean often omits subjects and objects when they are understood from context.

A fuller version might be something like:

• 스탠딩석 표는 매진이지만 지정석 표는 아직 있어.

But if everyone already knows you are talking about tickets, 표 can be dropped.

This makes the sentence more natural and less repetitive. Korean relies heavily on context, much more than English does.

No. There are several ways to express contrast in Korean.

This sentence uses:

• 매진이지만 = it’s sold out, but...

Other common options include:

• 매진인데 = it’s sold out, and/but...
• 매진이지만요 = a softer polite version
• 매진됐지만 = it got sold out, but...

For example:

• 스탠딩석은 매진됐지만 지정석은 아직 있어요.

That sounds very natural too.
The original sentence with -지만 is straightforward and clear, especially for a direct contrast.