[MichaelZuo]

Most of “the people selling something” have little to no credibility, so their words have no value beyond a very low bar.

It would be different if it’s someone e.g. very high up at a F500 selling something, even with a huge information asymmetry, because it’s still possible to bank on their credibility. (Assuming they offer sufficiently many guarantees signed by sufficiently many people.)

[a123b456c]

Why is it different with a F500?

I could think of reasons both in favor and against, but I'm curious about your rationale.

[MichaelZuo]

Because of the credibility attached to the organization that’s then offered as part of the written signed guarantees…

When there’s little to no credibility to offer, such as when a newly hired intern is selling it, then of course it’s no different.