Tourist from Russia had quite a fair share of Test & Go and sandbox Tourism, in particular in Phuket. In some hotels there, tourists from Russia count for more than 50% of the hotel guests.
Guess inflow of Russians will reduce dramatically, as they have now to pay 3.5 ruble for 1 THB instead of the already high 2.5 before the crisis.
Russians, who are already here will suddenly face blocked credit cards and other bank cards. Not sure whether hotels in Thailand are aware about that...
Anybody staying in a hotel with a lot of Russians....let us know about the situation and the scenes, when Russians check out.
I doubt many of them are on prepaid package tour or took tons of cash with them...

On the other hand tourists from Ukraine, they can not even return to their home country and are stranded in paradise....