[occamrazor]

It is unethical only if Grubhub says “I will deliver joe’s 12$ burger to you for a 4$ delivery fee” when the burger costs actually 9$. There’s nothing wrong if they say “I will bring you Joe’s burger for 16$ including delivery.”

In general we don’t expect resellers to reveal their cost of goods sold.

[a_c_s]

> It is unethical only if Grubhub says “I will deliver joe’s 12$ burger to you for a 4$ delivery fee” when the burger costs actually 9$

That's exactly what Grubhub is doing.

[pwinnski]

GrubHub describes themselves as a delivery service company, not a reseller. With resellers, I can comparison shop. GrubHub tries to make that difficult at best.