Sounds like one. Hey listen up. If you do this, this happens which is totally out of the norm and gives you something you wouldn't normally get. It's a glitch/flaw in game coding. Define a glitch!
First, you are making an equivalency argument that is false to begin with, i.e. that an exploit and a glitch are the same thing.
Then from there you make an equivalency argument based on that false premise, that taking advantage of a truck spawning glitch (I'm not even sure it is a glitch) is the same as the LSC exploit.
Let me tell you where you're wrong.
Despite the OPs helpful suggestions on how to keep the trucks spawning, there actually isn't a way to control the spawning.
I have never used the method the OP suggested, and I too have experienced sessions either by myself or with one, two or more people where we have collected anywhere from $100,000 - $300,000 per player. My method...one sticky on the back of the truck doors... blow them open...collect the money lose the stars, rinse and repeat.
I have never, parked in front of the truck to block it, nor hijacked the truck.
Sometimes only one truck will spawn...sometimes they will spawn back to back. And the amount varies from session to session.
With the LSC exploit, everyone utilizes the same method the same way with the same result. There is never a time where you are unable to use it. You will not go days without being able to enter an LSC.
There is no, "chance" with an exploit...it is a guaranteed thing.
And as I said earlier...I'm not even sure if the truck spawning is even a glitch to begin with.