It's 5 dollars. Stop being cheap. Buy it if it sounds like something you'd like, if not, don't buy it. You don't get a demo of a movie when you buy it. You can't just watch half of it and then decide if you want to buy a ticket. It's pretty obnoxious when tech-types bitch about $5 yet have no problem billing clients $100+ per hour or making $100K+ per year as a developer of the very types of things about which they complain about paying $5. It's not unlike restaurant waiters not leaving tips when they themselves go out to eat. Not everything needs a demo. Perhaps a quick screencast or something if you feel like the screenshots don't do the product justice. But it's a text editor.. how much demo is actually needed?
It's the price of a beer, come on! As developers in this community we must understand how much hard work goes into these things and we should not cheapen the work of fellow devs making innovative projects.
It's a five dollar app. Of course, there's no demo because hey, it's only five dollars.
This new marketing model blows.