You have a poor grasp of economics.
Please read this post and the two following it:
http://androidforums.com/android-ap...itouch-pinch-zoom-browser-26.html#post1672487
These developers work hard and deserve to be compensated. Don't under-value something just because some large developers can make money without charging for the product directly. Opera makes money on this because they have a whole PC/Mac market as well as the mobile market to leverage, and they're a large, established organization. Firefox makes money on this because they are already making money through other channels, because they're a big company.
One developer putting together a web browser in his spare time is not in the same position. If the app is valuable to you, pay for it. If it's not valuable to you, skip it. But just because "it's a web browser" doesn't mean it should be free.
Also, this particular web browser has a killer feature - the text selection. It's the only web browser on the market that has movable handles to resize text selection and make it easy to copy/paste like iOS does on the iPhone.
I like xScope a lot. Absolutely worth paying for.