Read the article again, then. Anyone that has could get the list with a trivial amount of work. Security through obscurity isn’t going to hide that client list.
And who knows? Maybe someone competent whose company is a client will see that list and say, “hey, boss, I was on HN today, and…”
And who knows? Maybe someone competent whose company is a client will see that list and say, “hey, boss, I was on HN today, and…”