30% didn’t kill the App Store model. SaaS did. <- Great article on why 30% is obsolete.
I liked the article but jumping between physical goods and digital goods made for a bit of inconsistency. I pay ebay that much and I still need to wrap it up, pay for postage, and ship it.
You don't magically get free shipping since you sell at Amazon, you're still paying the same to ship it.
And these widgets seem to have no cost to produce more (unlike digital services).
Amazon seems to have the scam for selling digital books! 30% and has to be $2.99-$9.99 or else it's 65%!!! Plus, 15 cents a MB!!! No nice images on the cover of that book or an artist's mugshot! Apple is a BARGAIN compared to this.
It doesn't matter if I can put the app on my own web site and sell it and keep 99% of the profit, most people are never going to see it. If I sell 1.5 the number of copies because I'm on Apple's store, I'd make more than selling it on my own and I don't need to run my own site (or pay someone to run my site), I don't need to take charge card transactions or anything. I'm obviously talking a desktop app, since you can't sell an actual app on iOS unless you jump through their hoops. Unless I have something incredibly obscure, I think I'd sell way more than 1.5 copies on Apple's store vs. my own site (and I used to be pretty good at getting my websites decent in the rankings, back when I did that stuff).
Web apps:
My bank, college, credit card company, all pay to have apps created, they don't make a cent on them, but in this day and age they're expected to have them. Actually, they probably save money on staff/support, but they don't charge the user for anything. Plus, the bank lets me deposit checks into the app (which I'd gladly pay to do) so I'm sure they're saving money in the long run. The apps all run smoother than the web sites for the same company, I don't want the web interface to perform these services.