I arrive at Bangkok main airport in September 2022 on a visa exempt (30 days ) Australian passport, I asked a immigration officer (2 bars on her shoulder ) and she said there is no limit in 12 month period you can get a visa exempt on arrival
I spoke to an immigration officer when I arrived in late September she said there is no limit to the amount of visa exempt on arrival per year ( I am Australian)
When I travel , I always have RFID wallet and passport cover wallets , that way even if they are locked in your safe they can’t use skimming devices whilst in the room or even just outside the door !