Thai authorities don't have a history of trusting anyone, let alone foreigners.
The problem with Crypto exchanges like BitKub & Satang Pro is that on/off ramps to Thai baht means that the country's Currency Exchange Controls can be defeated. People can bring in Crypto bought overseas or worse, take their money out the country.
BitKub asks you to be a gentleman and not do this, but there are no obstacles in you doing it. I think this what they want to crack down on with Foreigners.
I can see future transactions for foreigners only transacting on the exchange, no deposit or withdrawal of crypto and only FIAT from your Thai bank being allowed to deposit and withdraw. In other words, impossible to defeat the Currency Exchange Regulations.