They do not count because most are thoughtless, such as:
"trading Shaymin, seeking Darkrai"
"hey i have darkrai whats ur fc"
"my fc is 2920 19292 taco bell"
"can u trade now"
"hold on lemme clone it"
"okay ill be on wifi my code is 4018 9383 burgers"
"ok see you on thanks"
If Trade posts did count, many there may as well be in the 5000s, lol.