What an offensive, restrictive, and anti-free software license! Too bad - this might have otherwise been a useful piece of software. The current license renders it toxic.
The GNU licenses are arguably the definition of free software. More permissive licensing just gives you the freedom to make software non-free. That's also offered for this project, but as a paid privilege.
The modifications (available to paying licensees) are designed to let this project be useful to those running scraping SaaS's. It lets them hook this into their proprietary infrastructures without GPL'ing their whole stack. Revisions/additions to the project itself need to be licensed as AGPL but the rest can remain proprietary.
The AGPLv3 license stands on its own without the modifications (they're optional). It's essentially a dual licensing option.
There are a limited number of ways to do open source and make a living at it. And given that I am in business independently with no investors, I have not many other options. The one path I've ruled out, at least for now, is BSD-style licensing, as that just allows SaaS operators to leverage my work, deny users freedom, and also not pay me for my time to help their commercial projects.