20.5
Apps that offer real money gaming (e.g. sports betting, poker, casino games, horse racing) must have necessary licensing and permissions in the locations where the App is used, must be restricted to those locations, and must be free on the App Store
20.6
Apps that use IAP to purchase credit or currency to use in conjunction with real money gaming will be rejected
Can someone that already has an gambling app comment on this? IAP is the primary source of income for such apps, and as far as I understand, we won't be able to submit freemium gambling apps anymore (at least, not easily)
https://developer.apple.com/appstore/resources/approval/guidelines.html