opt-in in whitelabel

If customer sets the mkt comms checkbox, the following should be set for all brands for the app country:
- marketingPush=true (dynamodb and mparticle)
- marketingEmail=true(dynamodb and mparticle)
- email_subscribe=opted_in(dynamodb and mparticle)
- push_subscribe=opted_in(dynamodb and mparticle)

opt-in in database

(...)
      "communicationPreferences": {
        "L": [
          {
            "M": {
              "id": {
                "S": "loyalty"
              },
              "value": {
                "S": "true"
              }
            }
          },
          {
            "M": {
              "id": {
                "S": "orderStatus"
              },
              "value": {
                "S": "true"
              }
            }
          },
          {
            "M": {
              "id": {
                "S": "marketingEmail"
              },
              "value": {
                "S": "true"
              }
            }
          },
          {
            "M": {
              "id": {
                "S": "email_subscribe"
              },
              "value": {
                "S": "opted_in"
              }
            }
          },
          {
            "M": {
              "id": {
                "S": "rewardsEmail"
              },
              "value": {
                "S": "true"
              }
            }
          },
          {
            "M": {
              "id": {
                "S": "Email Opt In"
              },
              "value": {
                "S": "true"
              }
            }
          },
          {
            "M": {
              "id": {
                "S": "marketingPush"
              },
              "value": {
                "S": "true"
              }
            }
          },
          {
            "M": {
              "id": {
                "S": "push_subscribe"
              },
              "value": {
                "S": "opted_in"
              }
            }
          },
          {
            "M": {
              "id": {
                "S": "rewardsPush"
              },
              "value": {
                "S": "true"
              }
            }
          }
        ]
      }

Does a customer who sign-up in PLK ES get registered in BK ES too?