[bagels]

There are minimum per transaction fees for most processors, so if you go at this alone, and you'd find that charging very small increments may not be feasible.

[andreareina]

That's up to the developer though isn't it?

[bagels]

Yes. I was just explaining one likely reason for this limit.

[huhtenberg]

And I'm sure Apple, being a small fish that they are, would be able to negotiate custom fee schedule to accommodate very small transactions. They just don't want to.