1: Copy-protections are just waste of money (and time), when there is a cracked version just about 5 clicks away (what apparently IS the case).
2: Copy-protections never were, never are and never will be "perfect".
3: Copy-protections will always cause problems (in some cases).
4: There always will be someone, who is able to make the protection being bypassed.
Why spend money for that (and the effort coming with it) ?