TLDR: You don't usually get any support if it's unlicensed, and it can be malware.

I know it, you've probably seen "Free Minecraft codes" or other sorts of pirated software/hacks/cracks/keygens; and you may have thought of doing it; don't!  Why? Well, it could be malware, and that can harm your data! In addition, you won't usually get support that easy because they want you to buy the program.

You are better off buying the full version of generally any program because you will get support and you will not risk getting any malware;

also, you should also follow the same concept in real life; for example, you don't steal a PC from the store, or your friend, etc. , even if you are poor or don't want to pay for it. Instead, you buy it, or ask the other owner for permission to use it!

In addition to that, you should not pay for any antiviruses that constantly annoy you about file/web site infections because those are usually rogues (usually, malware that disguises as an AV program) and if you use your real personal information, you might get lots of spam or something even worse, or even identity theft!