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?
you are undoubtedly right, top-level mazahism. You did not think by accident that you can infect your computer with viruses. We cried your dollars, and the creators of the program will bathe in your tokens. Since most users store their password data on the PC. Even if the access keys or passwords have been deleted, you can find them on the trail and on contact with the flash media, everything passes to the phishers.