> the App Store dramatically lowered the barriers to entry for developers Is there any platform with higher barriers to entry than the App Store? iOS development requires a proprietary toolchain only available on Apple hardware, programming languages hardly used elsewhere, not to mention the $99/year developer fee and the litany of vague and arbitrarily enforced rules and content guidelines for App Store release.
Compared to getting into PC retail sales? Yes, absolutely.
Compared to web development? No barriers at all, but hard to earn money other than by ads.
Compared to PC shareware? Well, that did have a lower barrier to entry and did make lots of money for id Software. This might genuinely have been the lowest barrier to entry platform that it was possible to earn money on.