What push notifications am I allowed to send?
How should the legal documents be interpreted?
"2.2. You may not use the APN for the purposes of advertising, product promotion, or direct marketing of any kind (e.g. up-selling, cross-selling, etc.), including, but not limited to, sending any messages to promote the use of Your Application or advertise the availability of new features or versions."
App Store Review Guidelines 5.6 says "Apps cannot use Push Notifications to send advertising, promotions, or direct marketing of any kind".
Following these rules, you're not allowed to send any push notifications since it would "promote the use of your application". This would also mean that most apps violate these rules; for example:
Deezer: "Hit play for endless music discovery with the Pop radio channel!"
Instaflash: "Got any underexposed photos that need fixing?"
since they promote the application and the use of it.
How do I know what push notifications I can send out without having my application removed from App Store?