[chriskelley]

The article is saying that Zapier is ripe to be unbundled.

Meaning it does many different things across many verticals, and that some of them are big enough that a company could be created around building a more specialized / better version of zapier just for a specific vertical.

[KaiserPro]

Unbundled implies that the company it's self splits up and focuses on a specific "vertical"

In this instance I would argue that the author is saying clone the idea but make sure the APIs offered are for a specific subsection of an industry.

Or more succinctly: jump on the bandwagon in the style of hipstermatic/instagram gold rush.