Update from current trip to Thailand(Dec 2016) as noted all Thailand ATMs charge 200 baht per transaction. My previous guess of uper limit is incorrect now. I drew out 12000 with no problem except I accidently chose Mastercard rate of exchange so got poor rate. My fault.SCB atms are a bit more faffing to get to right option. Bangkok bsnk is a bit more straightforward. Credit/debit cards are now more widely accepted. Tesco Lotus, Big C, department stores, McDonalds.PTT petrol stations even in smaller towns took the Revolut card with no problem. Small shops, post office and surprisingly KFC wont take them so have cash ready. Markets, street food sellers, bus tickets taxis still very much cash only. Hope this helps