I agree that it's bad for a company (or other powerful entity) to have a chilling effect on criticism.
But devil's advocate on this bit:
> but the airline has posted no evidence whatsoever that he has asked for this. In all likelihood the airline is lying.
Phone call? Not speaking when a nod will do? Intermediary and ambiguity around that?
Why lack of paper trail is plausible: Influencers live and die by their brand, and presumably know that a solid bit of unflattering evidence (e.g., that they're selling good reviews, or running an extortion racket) can go viral, and hurt their brand badly.
Or maybe the company has evidence, but, culturally (I don't know about Qatar, but do know there are places where commerce evolved to be built upon reputations more than law&government), maybe doxxing a person in accusation is an accepted response, with the accusation implicitly backed by one's own reputation. Or the culture respects power, and this is a flex in response to being threatened. Contrast with a culture brought up in judicial process thinking, or with company structures that are designed to defend against the many legal liabilities, which might tend to think more about evidence.
Or maybe it's a mix of everyone being wrong: questionable behavior by influencer, marketing person drops the ball in handling them, negative review, internal butt-covering, communications up the chain get mangled at each step, someone receives bad information and doesn't confirm it, acts out in a way that's not internationally advisable.
I don't know what I could say about likelihoods of this particular situation, based on the info in the article and what we know about the world (even prejudices).