Captcha detection wors like this:
Human player will always send 100% of merchant carrying capacity if he can (example: nearly full warehouse in one willage and nearly emty warehouse in another willage) (logical for human player)
human player will send resources little number of times with merchants 100% carrying capacity (logic: human thinks: I want less clicks)
TT will not do that in example above TT will not send 100% TT will send ex. 80% (less then 100%=not logical for human= captcha)
TT will send frequently and less then 100% carrying capacity= capcha
When warehouse and granary is lvl 5 or less (new willage) human have to (low warehuse and granary) send frequently and less then 100% = no capcha
I am not sure for lvl above 5 ( 5 and under 5 lvl capcha did not appear)