Agreed. I use Little Snitch currently. I wanted to give this a try but.... I won't buy an application up front. I understand the Dev will refund instantly as

Agreed. I use Little Snitch currently. I wanted to give this a try but.... I won't buy an application up front. I understand the Dev will refund instantly as stated in comments but it doesn't persuade me. I would even prefer a 15 day trial with a no commitment download. The only way to turn me off faster is to only distribute via the App store.