I agree that it's not fair or consistent but saying that alone means nothing. For any impact, action must be taken on those words: you can use legal means to try and change their behavior like Spotify did, you can negotiate like Amazon did, you can apply pressure by trashing them in the press like Epic did, you can attempt to circumvent the app store fees using various measures, you can leave for a different platform. Or you can apply some combination of any of these. Which one is the least expensive is entirely dependent on your situation. The reason why I spoke of the last option initially is that for the average individual developer your only real immediate action is to leave, everything else is collective in nature.