One way you can gauge just how wrong HN is about this point is to compare Tarsnap's business to that of any well-known backup provider, virtually all of which could (presuming, perhaps unfairly, that Colin is rational) buy Tarsnap with pocket change.
Backup is a huge business, and enterprise/business backup is an especially lucrative segment of that business. Colin has the most technically credible offering for that segment. But he captures only a tiny fraction of it, and regularly finds himself on HN explaining to HN people why Tarsnap costs so much given how cheap AWS storage is. Q.E.D.