* Two, many users care about this enough to refuse payment systems that don't have it. In that case there will be a market for another payment system that has easy cancellations but charges ~5% instead of 30%.*
That line of reasoning holds when all else is equal, which it almost never is when it comes to apps. No matter how passionate anyone is about payment systems, it’s still extremely unlikely to rise to become the determining factor when deciding to install an app. If a person wants to play Fortnite with their friends, but doesn’t like the payment system, they don’t magically get to choose a Fortnite clone with a payment system that’s more to their liking.
That line of reasoning holds when all else is equal, which it almost never is when it comes to apps. No matter how passionate anyone is about payment systems, it’s still extremely unlikely to rise to become the determining factor when deciding to install an app. If a person wants to play Fortnite with their friends, but doesn’t like the payment system, they don’t magically get to choose a Fortnite clone with a payment system that’s more to their liking.