Didn't an owner of a big software company have a server of their pirated software available for download awhile ago? I think it was like business/server software mainly.. on the theory that if people get it for free at home, use it, and get addicted to it, that's what they'll buy when it comes time to get software for a business. Wouldn't be so much true of non-commercial applications, but for expensive software someone would use for a business, it makes sense.. it's far more dangerous to use pirated software for anything commercial.
I usually stick to open source stuff for exactly that reason.. a lot of it is just as good, and I'd rather be familiar with something that's legally free. I got used to The GIMP before I ever tried PhotoShop.. and when I tried out PhotoShop, I couldn't stand it.. I was already acquainted with doing everything on GIMP.