Why "Should" they give something to somebody just because the the person considers they should?
Are they not permitted to run their business without the permission of some nobody on the internet?
My opinion is that they are quite correct to decline giving any individual or business a free gift by choice.
It's not about permission, nor is the implication that if any of us, or enough of us think they should, that they would then be somehow obliged to.
Frontier have every right to choose to decline, whether it be correct or incorrect to do so in the context being discussed, or in the opinion of their customers.
My view is that enough of Frontier's customers value Yamik's content that it would have been a better business decision to include him in the distribution list.
Failing that, I think they should have been more direct with him about the reason for declining, instead of giving the insulting and dishonest response they did.