My read of this is based on an assumption that monopolies will always structure their business around being monopolies. This post is implying that there cases where there are not, and those are the only cases where antitrust law should be enforced. Based on this contradiction, as well as the odd phrasing, emphasizing how important making money is over resolving the badness of monopolies, I'm pretty sure this is a joke.

It's a distillation of the top level comment done in a sarcastic manner meant to indicate the dubious natute of the original claim.

I would assume they're being facetious.