The Humble Bundle app allows you to install Android games you bought through humble bundles onto your Android phone. This allows you to buy bundles of games from developers at your own desired purchase price and give an amount of that purchase you choose to some charities of your choice.
It is, quite literally, used as another store and has the ability to install applications.
Many of the games I've gotten through that are also available on iOS, but you're unable to get iOS versions from this because there's no way to install that app nor a way for it to install other applications if you did, currently.
At least some of those developers would be happy to offer iOS versions as a bundle, or even give you access to choose iOS or Android in the same bundle, but there's no way to legitimately deliver these games to those customers.
Recently, cloud gaming apps and paying for subscriptions. Google Stadia and Xbox Streaming are not allowed through the iOS Store. Netflix and Spotify(not sure about this one) do not allow you to pay for the subscription on their app because Apple asks for 30%.
Apple does not allow other browser rendering engines. So now every iOS browser is just a Safari wrapper and you're unable to do any sort of plug-in, like adblockers.
These features being blocked does not help customers. They only help Apple.
Or are users seeing awful prices for the app store?
Where are Customers complaining the most?