I make them but frankly, they are a bug out bag or around the house item.
If you tie the cord to something, it's a very irregular draw. I know a few people that use them as the closest thing to Mexican Carry that is safe... but... hmmm.
People are giving cool sounding names to what's essentially a trigger guard holster attached to a paracord loop. I have a few dotted around the house tied to things I can spend long periods at and might want to take my gun off... like my desk, the bed, the bench in the garage so if I don't want a gun on it's secure enough the trigger is covered.
I do like the look of the clip draw though for carry.