It's both? They have a ridiculous approvals process considering the approvals process doesn't even work. They say they have to block all these legitimate apps as an accident of having tight security, but then they don't actually have tight security. Half the time it seems like the criteria for approving an app is how much ad revenue it brings the app store owner. Everyone who makes a legitimate app has stories of having updates denied after 3-4 weeks for no reason or a stupid reason, then resubmitting, and having it approved after another 3-4 weeks. And then they claim they need a 30% cut of all your income in order to pay for this process there's no possible way to eliminate even though it doesn't achieve its stated goals at all. Their stock price says they're not spending very much of it on that process.

I bet Apple's and Google's own apps don't have to wait 6-8 weeks. Maybe it's purely anticompetitive.

Edit: Oh, and the fact they get away telling such obvious lies without constantly being called out 24/7 by millions of people speaks to the power dynamic in play.