but technically, would you somehow have to get the DTV canceled when you are for a particular entry not want to pursue a Muay Thai class but let’s say, just come in for a two week vacation? Or tell the IO so they give you a visa exempt 60 days instead of the 180 days? I believe, unfortunately these rules are not publicly accessible, if they exist.
While you should spend hours reading the valuable info in this group, you don’t have to spend hours on the actual application website. If you are prepared and have your documents ready and merged into PDFs, the actual process doesn’t take that much time, even if you double/triple check every entry field.