> when companies have told me that they hate the GPL because they are not keen on spending a lot of time, energy, and money modifying some piece of code, only to be required to give it to their competitors for free Some piece of code that also cost time (and possibly someone's else money) to develop, and that they got for free?
This struck me as bizarre as well. You're thanking someone because you relicensed your hard work so they can use it for free (BSD) and you complied? All for the stated reason that they don't have to relicense their work to other people so they could use it for free? /facepalm It's like some version of the Stockholm syndrome, deserves a name.
I'm surprised how much difficulty some people have in understanding that others might make different licensing choices. If I license software under a BSD/MIT-like license, it's not an accident – it's specifically done so that there are as few restrictions on that software as possible.
Don't get me wrong – the GPL is important and making the choice to license under it is a totally legitimate personal choice with various pros and cons versus a BSD license. But it's not the only rational choice to make, and I wish you'd be a bit more open-minded about that.