Scopes in aud claim

[VJalili]

Is there any reason scopes are included in aud?

"aud": [
    "openid",
    "user",
    "data",
    "abcdefghijklmnopqrstuvwxyz"
  ]

I was expecting aud to be a single case-sensitive string (audience id) if there is only one audience, and a list of multiple case-sensitive strings (multiple audience ids) if multiple audiences are defined. However, not sure why scopes are also included the aud claim.