Your statement doesn't get generated until the billing period closes. For all intents and purposes, the one number that gets reported to the credit bureau is the balance shown on that statement, which is a fixed value for the whole month. Even if you pay off the entire balance as soon as the statement gets generated, you can see a zero number for most days during that month, but credit bureaus still see the positive number on your statement.
Your statement doesn't get generated until the billing period closes. For all intents and purposes, the one number that gets reported to the credit bureau is the balance shown on that statement, which is a fixed value for the whole month. Even if you pay off the entire balance as soon as the statement gets generated, you can see a zero number for most days during that month, but credit bureaus still see the positive number on your statement.