[mrjin]

The answer is simple: no such needs ever...

To deploy mainframes, you've most likely spent millions, sometime might even be hundreds of millions. In other words, money is not the problem. So why would someone ever risk getting into huge trouble by reverse engineering or cracking?

[unixhero]

Because information wants to be free

Curiousness

A challenge

There are sometimes second hand mainframes for sale on Ebay