Original Link: http://www.marco.org/2014/12/01/app-store-rule-5-6

From Apple’s App Store rules:

5.6 Apps cannot use Push Notifications to send advertising, promotions, or direct marketing of any kind

In practice, this rule is blatantly disregarded by thousands of apps that routinely violate it by sending promotional push notifications. It has become a widespread standard practice, even among small developers with lapses in judgment.

It’s not hard to figure out why this rule isn’t enforced — it’s mostly unenforceable. A violation isn’t likely to be caught by Apple’s reviewers in the few minutes they spend with each app.

Apple would need some sort of violation-reporting mechanism on each notification, which would add ugly clutter to the UI and would require a staff at Apple to go through each report and reliably act on abuses, neither of which Apple is ever likely to do.

And this afternoon, Apple itself violated this rule

Apps do this so much that it helps with the whole idea of limiting your apps that can send notifications.