Edit2: Good extension, I appreciate the dev's communication and hard work. I saw the news about the generous 40 free clicks when I booted up a browser with the extension still installed. I didn't expect to editing my review again, but I thought some more about this extension recently and I think the pricing model is pretty fair. As long as the lifetime license price option never gets taken away from users.
Edit: You are free not to want to pay, it is understandable. I just don't see how that justifies giving low reviews to every extension that is not free. Does that mean I should pay developers out of pocket? That people should work for free?
