Well, if you ever need to use some software you lost the license to after legitimately purchasing it, a lot of .ir websites have very good selections of ways around that for almost any software you can imagine.
That goes with sanctions; as a result the Iranian warez scene is actually vital to their economy.
I have never seen one. Bandwidth costs are ridiculously high in Iran, so most websites are hosted outside of Iran. There are Iranian piracy sites, but they block non-Iranian IP addresses to avoid being kicked off their hosting service.
Is this why many movie piracy sites are hosted on .ir domains?