In terms of UX and as a consumer, I'd rather the Dropbox API not open a browser or even another app. That is not the best UX, it doesn't provide a security advantage, and it's simply not being done to benefit the consumer. This may not be Apple's primary rational for rejecting these apps, but I'm glad they're doing it.
As for the payment question, simply in terms of UX and as a consumer, I want only one payment provider and account on the device. I hate pulling my credit card out and remembering my password for the nth account.
Consumers are happy with the platform. Look at the sales numbers and earnings reports. Obviously companies like Dropbox see the value in the platform too -- I just wish they'd take the time to understand why it has that value, and why Apple has huge profits and very happy users.
As for the payment question, simply in terms of UX and as a consumer, I want only one payment provider and account on the device. I hate pulling my credit card out and remembering my password for the nth account.
Consumers are happy with the platform. Look at the sales numbers and earnings reports. Obviously companies like Dropbox see the value in the platform too -- I just wish they'd take the time to understand why it has that value, and why Apple has huge profits and very happy users.