1. Mildly harder on a OS level
2. Less popular in countries that produce the most cracks
3. Less popular in general
4. Has an audience that is demonstrably more likely to pay for software
5. Has less strong reverse engineering software. Hopper was awful.
Also, I just wanted to say I love your work. I've learned a lot from your blog, your free trial strategies are interesting, and quite effective: https://shottr.cc/s/1vQa/SCR-20240423-re6.png
The flip side of this is that I've noticed software written solely for macOS/iOS is often more polished than many of the most popular FOSS projects written for Linux.
Obviously I don't have any expectation of software provided for free, but as someone who makes a living developing software I do find it funny how much reticence there is among other developers to pay for high quality software.
I think, as a developer, I value the ability to fix things I don't like. I've done it quite a lot in open source software. Just plant my fix and move on. Steam always felt complete. macOS software often feels closer to completion, though sometimes I do wish I could modify it still. Also, another class is software I trust that I could not do a better job on, like Affinity.
Anyway, I think that's the root of the developer aversion to paying for software.... Well, for me anyway. I wish we had better culture around donating to free software as well.
Though I'm actually not against paying for access to stream media. I am however against telling people what they can do with the media once they stream it (ie saving it to their own drive for future playback).
Paying for access to a media repository makes slightly more sense than paying for access a to software repository also, just given the sheer amount of data that media tends to take up vs how much data software tends to use. GNU software repositories are fairly easily hosted by hobbyists; multi-billion dollar companies often burn money trying to monetize media storage and distribution (particularly video). In that sense, there is some scarcity in media distribution. Software distribution trends to be next to nothing though.
I am also certainly against DRM, as I am any malware :P