The idea is to work a bit like the magic number to help to identify the EA's But instead of numbers we use the comments since most EA's have the comment field and some are editable
I came to say the same, when you trade multiple signal providers on one account and want to check each one's performance, being able to add a comment to each trade and then filtering the trades here on the site would be awesome.
Yes, when we use signals, we put in general the name of this signal in comment. Currently, I use an Excel file to check the performance... while everything is on MyFxBook, it's sad!
I think MyFXbook is satisfied with this antiquated community setup because they make no money from a chatroom/board. Nothing has changed since I last visited myfxbook about 10 years ago, and it was old then.