App review is effectively a black box since the rules are applied so inconsistently, and working for weeks or months on something only to find out the Apple doesn't like it is a constant concern.
Unless you're Facebook which has recently been caught abusing silent notifications to start up in the background and continue running permanently by streaming music at zero-volume while draining battery.
Apple responds decently when developers have big media presence notice their abusive process and rolls over passively when powerful players like Facebook have them over a barrel. It's a stormy ocean when you're independent. Best to be careful.
increasingly disinterested in
You mean 'uninterested,' not 'disinterested.'