Thanks. It seems it's split
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on experts who say it counts as "remittance" and those who say it doesn't. I even saw a guy that said he asked at a tax office in Bangkok and they told him it doesn't count. Anyway as you said it's hard to enforce because there's no way for the authorities to verify what is and isn't foreign revenue. And you would most likely be covered by an agreement between Thailand and your home country anyway.