Suddenly started charging a ridiculous rate for what was free. It is one thing to charge for your work - it is another thing entirely to suddenly switch to a paid model with zero transparency. The website for this extension doesn't mention anywhere that it is NOT FREE, nor does the extension page on the store. I will no longer be using this as a result

Update: the developer waited almost 2 weeks since my review, updated both this extension's store page and their website, and they've now posted a response claiming I was wrong. But neither place mentioned pricing (or "not free") when I originally posted. The pricing on the website is buried in the FAQs page, so technically it is there (as of now). Claiming that you informed customers of the business model change by putting in a pop-up that asks for money is not most people's idea of being transparent (compare that to a pop-up that warns me for several months in advance that you'll start charging)