My take on it is this:
I do a lot of discos, it has been my profession for the last twenty-several years. The tools of my trade have been, for a long time, CDs, vinyl before that (7" singles and albums to the oldies here

I buy the tools of my trade, the same as a mechanic would by spanners and rachets, and an electrician would buy screwdrivers and wire cutters. The difference between my profession and most others is that I can download my tools online, you cannot download a screwdriver.
If I download my tools for free, the makers of my tools will not make any money, so they will go out of business, which in turn will put me out of business.
It is common sense - if you want a tool to do your job - buy it! You are earning money from it, the creator deserves his little piece too. If the Jay Sankeys and Max Mavens of this world get all their material ripped off then they will stop creating and we will be the losers.
Most of the routines I have bought I have changed to suit my style, or I hav come up with alternate handlings to cover possible exposure and I am sure most people have done the same - some like the DL, others prefer the velvet turnover - by all means adapt a trick/routine to suit your style, but don't rip off the inventor!
You know what they say about biting the hand that feeds.....