First there was 1 followed by 5. Now there’s 1 followed by 10. After the inevitable glitches of the pilot scheme (Phuket) have been identified and addressed, 10 more provinces including Bangkok will be added from 1 October according to an article in the Bangkok Post:

https://www.bangkokpost.com/thailand...cus-on-tourism

(I had been hoping to throw in Enid Blyton references to the Famous Five and the Secret Seven but the TAT got the better of me)