Guild Wars 2

I wanted someone from the staff would have solved my doubt but that has not happened.

Looking for information I found what is a loop:
https://forum-en.gw2archive.eu/forum/game/bltc/How-to-make-1-glob-of-ectoplasm-into-stacks/page/2#post1037389

John Smith says exactly “finding a loop that reliably produces more and more items in a cycle is an exploit”.
But then I found this video:
http://www.youtube.com/watch?feature=player_detailpage&v=OTayQ7g8qSQ&t=116

In this video Richie P says in 3:25 that there was not an endless loop but it was a loop.
Honestly, that makes no sense. By definition, a loop is something without limit. If it ends, is not a loop.

Also as John Smith also said: “There were several recipes that produced significantly more output than the input required and could be easily and reliably cycled without using Black Lion kits.”

They were more recipes that produced more output than the input required and it are not exploit.

Analyzing it, I deduce that these bans were for taking advantage of a recipe that produced benefits like many others but it was not a loop.

Based on this arguments, arenanet could ban anyone who only plays with the market. Anything you make a profit could be considered an exploit.

I am a bit concerned about this and I would like if someone from the staff could clarify the situation.

Hello

I am interested in making money in the market but I have a doubt.
I have seen that some peopla have been banned for using loops in the market.
So my question is:
What is a market loop?
Thanks in advance!