The only problem with SCB is they don't label the transfers as coming from overseas, which is why most 65k transferers will use Bangkok Bank or Kasikorn
Correct. I don't find this tightening of policy to be erratic and difficult to follow. It's easy enough. Keep the 800k in the account for two months before and three months after extension date, and 400k the rest of the year and your account will never be frozen and you will get your letter and your statement
I don't find the changes "erratic". Those doing the right thing are completely unaffected. It's only those hellbent on paying bribes to get visa extensions that are melting down over this, as it appears to be the beginning of the end for many suspect visas