"... Some of the reasons prerendering might not happen: ... * Chrome encountered another prerender directive within the last 500 ms." [1]

[1] https://developers.google.com/chrome/whitepapers/prerender

List Https as reason to not prerender. There goes the idea of using it for a sales funnel.

I bet Chrome's implementation of this is super-careful about avoiding loops or going deeper than one level.

I would imagine that it doesn't prerender the next page until the first is actually displayed.

Yep, that's how it's implemented.

It wasn't meant as an insult - honestly!