Most of the people who's comments I've read should be really embarrassed for themselves. I think the developer explained her position thoroughly and fairly -- which is precisely what people always claim they want -- and then her reward for being so up-front is to be libelled (yes, libelled as in "legally actionable," some of you might want to look up the tests and then look in a mirror) on forums.
If you don't want to upgrade, don't. Wow, you saved your self FIVE WHOLE BUCKS. Boy you showed HER. Why, you could buy half a Starbucks coffee with your savvy savings!
As it happens, I won't be upgrading. Not because of anything Sophie did -- I just don't use the program much, and thus don't care to upgrade (though this "upgrade" is so cheap I consider it a trivial expense). I might come back to it someday, but I just don't spend much time in my iTunes music library as I used to (I've been more focused on video lately).
The rest of you -- grow up, or at least interface with the real world of income and expenses a little more often.