If you download and try something, and don't on sell it or any of the IP, and you were never going to buy it, but would like to understand it, who loses? - nobody.
Sure, pirating stuff and making money from it, either by selling it or using it to make income from it is theft.
Learning some software package, and then working for someone with a licensed copy is promoting the software -- just look at ACAD.
Packages that are not backward compatible, like SW cause users to be sucked in by smart marketing, but in the CAD/CAM area if you have a licensed SW, say 2010, and you pay someone who has >2010 to do work on your file(s) they can no longer be opened in 2010. That is just bad, dumb stuff.
ACAD and many other packages don't have that vice. Hope $140 is not spent on SW. Try something else. Don't be sucked in by 'you need a later version' now. I forgot to tell you it would be useless next year, and I have 2 customers that are moving away from such sneaky marketed products as I type.
The excuse is the new features can't be integrated. CR4P!! Features you may not even want, but have no option but to buy.
I have been programming professionally since computers didn't have keyboards.
Yes, I protect my IP, and might even share some around from time to time.
2 packages still running out there 24 years later. Got paid once, and that was fine.
Super X3. 3600rpm. Sheridan 6"x24" Lathe + more. Three ways to fix things: The right way, the other way, and maybe your way, which is possibly a faster wrong way.