The good news is you can now publish to Zendesk articles.
The bad news is it really works only for single topics.
If you have a complicated document with several levels of topics, all the subtopics are folded into the top-level parent topic. For example, I have several hundred topics in a single document that we distribute as PDF and online help. The top-level topics are basically book titles: Programmer's Guide, Administrator's Guide, etc. On expert to Zendesk, all the topics in the Programmer's Guide got dumped into a single file.
To make matters worse, all cross-references are converted to static text. Paligo adds "the section called" before the topic name, but there's no way to tell which top-level file contains that topic. My docs are extensively cross-referenced (that's one of the reasons they're distributed as a single PDF or help system), so the Zendesk version is pretty much impossible to navigate.
This is apparently a limitation of Zendesk, so there's probably nothing Paligo can do about it.
Even with these limitations, it should be very useful for some users.