"But as soon as you want to customize and keep the changes, they want to charge you"
Neither GPL nor AGPL require you to submit anything back (or charges you) for changes made to your system for your own usage. Even if it is within a company. It is about preventing distributing derivates to the public under closed source licenses.
You can even have and keep changes (unpublished) for you entire organization without having to contribute back. It is when you distribute it back to public that you have to license the changes under the same license.
There is no baiting here.