I think I understand the OP's grip now. Not that I agreed, but I am understanding the situation now.
OP was under the mistaken impression due to failure to read terms of sales and fully understanding what he is buying. He subsequently discovered to his dismay that he needed to pay more than what he had originally planned for a certain set of features.
Understanding, deep down, this was really his own fault for buying without a full understanding of what he is buying like he should and would have in other situation such as house or car, OP proceed to complained and vent about the value of the software basedon his own valuation and now having to pay above that valuation due to his failure to understand what he is getting for what he pays.
To OP, I guess next time you buy something you will conduct your due diligence.
To Lichi Developers, a list of features included and a list of features available for in-app purchase wouldn't be out of order and would go a long way to demonstrate this is a legit operation.