Why? It's only 5 bucks. You spend more money at every damn coffee shop every day. For this work, this niche, it shows respect to also give a few bucks for it. C64 programmers don't get rich with it. Just do it...
Why not a demo ? If you want to buy it. So, you let´s go for it and finally I didn´t disrespect for request something that only depends of the author. It will depend of her if she want it or not. C64 ( a channel well known in internet ) just only want to help.