Only if you weren't already paying for Prime. If you were, then it's irrelevant ... | Hacker News

Hacker Newsnew | past | comments | ask | show | jobs | submit

		bigstrat2003 3 months ago \| parent \| context \| favorite \| on: Postal Arbitrage Only if you weren't already paying for Prime. If you were, then it's irrelevant as this usage adds no marginal cost.

moralestapia 3 months ago [–]

"If you already pay for shipping then shipping adds no marginal cost."

OkayPhysicist 3 months ago | [–]

well, yeah. That's what the phrase "marginal cost" means: if it costs $x to do something N times, and $x + $y to do something N+1 times, $y is the marginal cost.

Consider applying for YC's Summer 2026 batch! Applications are open till May 4
Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact