[zyNoT]

So, what is a reason for someone to test it for you if you lock it for 30 days for this person? Someone who test it for you should get at list one license for him for free or for reasonable discounted price.

This program took a lot of my time, and I mean A LOT! I help people as much as I can, but I dedicated much of my time to creating this and perfecting it. I lost out on things I could have otherwise been doing in my life. Giving a copy that doesn't expire could open the doors to people unpacking, cracking, etc. 
If I lock the programs code to only being able to set expiry 30 days out at a max date then I limit the ability to do just that.
And I really had to cool off before writing this seeing as how my work has been resold by you and others previously. 
When you resell my work, you don't do it to help people, you're doing it to make money. If it was the latter I would care less.
Been burned way too many times. Sorry. I am, however, giving a substantial discount to those who have helped during testing.