I know that.
Often when I find an app and I want to try it out first before buying, I notice that there is no demo. So I get a cracked version, try it out and if I like it, I buy the real thing. 90% of the apps I have are actually bought or free apps. I did it because they had a reasonable price. There's no point in bothering to find, download and installing it manually when it costs $1. A coke in a pub costs more. xD