On August 23, 2024, the Ministry of Foreign Affairs (MFA) in Thailand announced that they are accelerating the implementation of a new system, a new travel requirement for visitors to Thailand, that would introduce a mandatory requirement for all tourists once operational. Starting in December 2024, the Electronic Travel Authorization (ETA) system will be introduced and all foreigners looking to travel to Thailand under the visa exemption scheme will be required to enroll in it from June 2025 onwards.
Doesn't mention DTAC anywhere on the page.