I think it's one stupid idea.
Basically you crypt your files and the only way to get it the decrypted is by sending a sum to an address from which those guys take a fee?
Correct me if I'm wrong but from their tiny instructions, this is all I could figure.
Besides, it's not ransomware, it's more like masochistware to me.
What if you need those files urgently and you have no BTC left?

There are hundreds of ways to secure your files by encryption for free, why would you pay for this?
Sometimes, I am always taken aback about the 'ingenuity' of our so called developers in on what they come up with and called a project and I believe if there is an opportunity to raise an ICO, he would surely take it and then talk about how difficult it is to get people to invest thinking they just invest in anything. Aside from the issue you raised, what if I keep my private key, and someone access it on their server which means I willingly handed over the key to my safe room to an external party which even negates the principle of blockchain that you should be the one in charge of your wallet no matter how safe the third party is making his service.
LOL
I laugh at peoples commenting without taking time to read the whole first posts of this thread, they take in count and read the first comment only and make their jugement based on that.
This software let you sell your files, or any digital goods by encrypting + archive it locally (without losting your original file) and then share over the web and broadcast it for potential buyers.
By reading the OP post, I logically thought about that, I do not know how you can come up with such misunderstanding and bad use about this software.
And the decentralized part of this software make it for both users and czip, less space for file storage, and for users prevent from file deletion since the file is not stored on the server.