If it didn’t take the approach that Photoshop is the tool for PROGRAMMERS to use. Real Programmers use Gimp, Scribus, Inkscape. Not Photoshop.
For a lot of us, it isn’t the cost of using Photoshop. It’s the fact that you are helping to legitimize use of a proprietary, closed-source tool. Not only that, but one (well, two) from a company that is known for shutting down good products or failing to offer them on varied platforms. Take for example FrameMaker, a very wonderful (definitely world-class, arguable THE best) publishing system, originally written on UNIX, that Adobe (1) bought, (2) ported to Windows and Mac, (3) stopped offering on most Unixes, (4) stopped offering on Mac OS X. There’s still a lot of anger out there, and you’re attracting some of it by choosing a corporate designer tool and offering it to programmers.
The “use the free trial” argument doesn’t cut it, sorry. Either it’s not available for my platform, or I don’t trust them to keep making it available. In my case, both.