because the law was made for Thai millionaires that are doing money laundering etc through crypto.
Second reason is... They don't have the manpower and resources to check every expat and Thai person and find them and force them to pay tax and fines.
And I mentioned 2 million baht which could be a bit more or less and probably also depends on frequency of transfers. The bank system puts like red flags on these accounts, which will probably be checked by the Tax department.
Someone mentioned Ai might check everything... But it's Thailand. Their fingerprint system in the airport doesn't even work 100% correctly
But this is just all logical speculation. I have no bullet proof evidence for my claims
My friend stayed in Thailand for 5 years on tourist visas and covid extensios. Occasionally they pull him aside and tell him that next time he can't come in... He always bring the 3 proofs. At landborders they usually don't pull him aside.