[kartickv]

What are some alternatives to Mac App Store that give the developer the same services, like handling payment, including subscriptions, downloads, some DRM to prevent casual copying and updates, for less than 30%?

Last I checked, I had to assemble the above from disparate services, investigating each, integrating them, and paying for each, which doesn't seem like a productive use of my time or money.

[untog]

That's not an answerable question in any universal way. 30% of what?

Assembling from disparate sources will have more of an upfront cost but cost less per purchase. So it depends entirely on your sales volume.

[kartickv]

30% of the sale price, obviously.

Regarding your second point, interesting, seems like MAS is good to get started until the app reaches a certain volume.