If I buy something that's supposed to form the base of my own business including handling payments and data of my customers, I consider that a very serious, very important business partnership. So I will choose very carefully and behavior like this doesn't exactly make me confident in this choice.

Which is a pity because otherwise I'd be interested.

I understand what you mean now. How could we re-establish trust? I'm not asking so you'd buy my product. It really saddens me that you thinks I might be a scammer so I'm willing to show you otherwise. Would you be willing to try my product out, check out the code, make yourself an opinion (for free)? If you like it then just maybe you can decide to pay for it... That'll be up to you.

I didn't ignore you last time, I simply went to bed.