someone created something that they'd like to make a little money off of, while still taking very extensive steps to make it available, extensible, and prevent lock in. they chose a path to profit with all of these goals in mind. you're demanding an awful lot for something that "improves extensibility by even 0.0000001%". in the spectrum between "i want to extract money from the users of this product" and "i want this product to be used as the users see fit", i would say this product's goals lean towards the latter.
please don't say the wording is the problem. "as extensible as possible" is fine. "as possible" is a qualifier, it clearly means "as extensible as possible without undermining other goals". you're pretending that they've promised to make it extensible at the expense of _everything_ else, and that assumption in context in unfounded.
it's true that paths to monetization exist for open source software, but they usually aren't accessible to an individual developer who is building a small bootstrapped side-project to generate small amounts of passive income.