Eventually, all apps would fall prey to Apple's tactics. Damus is the largest fish and the first to get taken down. Once other apps get noticed, they will too under the current rules.
Discussion
Plebstr, Fountain, soon to be Zebedee…. List will go on.
I hadn't thought about Fountain, but you're right. Fountain is a great example as users pay creators for content they consume. That fits in line with this rule.
