I use apps connected to pay SaaS services (Concur, SalesForce) -- the apps are free with no IAP, but my company pays a lot for them. Yammer has pay services and a free iOS app with no IAP. I think if you look for them, you will see tons of apps like this that are the front-end to a SaaS service (not content) -- why is yours any different?
Well, thats another thing we are exploring. If a third party developer makes an App "ZapDrive Browser" using our API and does not link to the website, that should be ok. Because, technically, they can not offer IAP, since they can't do it in first place. Its like developers using Dropbox API in their Apps, as long as they don't point to Dropbox, they are approved.
Thats a good point you raise. But at the end, there is the ultimate reason that Apple has: "Just because other Apps are doing this, does not mean you can do this too." I think they have put "cloud storage" into a category, that has to offer IAP. Since they made Dropbox and Google Drive offer IAPs already, they expect every new entrant to follow in line. I am sure they will start targeting other SaaS markets as well.
