you say they asked for "different docs" but not specified which ones, or if you sent them. if they want a document, no amount of "explanations" will resolve it, only the requested documents... no exceptions. if you can't supply the docs, you can play resubmit 1000's of times, and never get past that point.
completely incorrect. Homeland secretary has many times been on the boarding ramp asking this exact question
There's a tv series of real immigration agents from several different countries that is rather helpful to watch and clear up a lpt of completely incorrect information about this topic
Rule is less than 10k for a group and not per person. There's a tv series " something smugglers" can't recall exact name but this comes up a fair bit and you break that rule they seize it all and you won't ever get it back. That's any country not just USA
in Thailand any foreigner can only operate in selected categories and i don't believe that you are correct on the other part. Unless you can point to something that specifically states us llcs can't operate overseas, they are just a different type of company than a c corp