Who issued the rule? It was never a "Law". Was it a BoT (Bank of Thailand) rule or guideline - must be a link to it. Was it a rule of individual banks or was it just left to the discretion of individual bank managers?
Sounds to me the agency is trying to maximise income by offering the ED rather than the DTV. This type of marketing is called FUD (Fear, Uncertainty & Doubt). The new government will not be making any changes in the 4 months they have before a General Election next year. There has been nothing said by anyone as far as I can see regarding the DTV by any political party. It is not exactly an everyday concern to the electorate. Apply for your DTV and good luck. Edit: the ED is recurring revenue for the agent. The DTV is a one off payment for them.
So you had a Google and you found one article in The Nation. 5555 So your single point of data is your considered hypothesis? Guessing you missed the statistics course at university. PS: Anecdotes do not make data regarding your other point and your domestic arrangements.
: Year-round pollution is much worse in Bangkok than in Chiang Mai. This year, there was no burning season noticeable at all in Chiang Mai. Bangkok has terrible air quality year-round.