广州天河路商圈是全市离境退税申请开单量和销售额最多的地方。其中，天环广场共有40多家离境退税商店，成为广州第一个集中退付点所在地。
增值电信业务经营许可证：沪B2-2017116
。91视频对此有专业解读
sciencedirect.com
This makes sense. These keys were designed as project identifiers for billing, and can be further restricted with (bypassable) controls like HTTP referer allow-listing. They were not designed as authentication credentials.