By his own description of what it does, I'd say the app is highly likely to be selling access to content that the author hasn't licensed, and is on sketchy copyright grounds.
Also, the fact that a vote manipulation app...
https://www.theverge.com/2020/2/4/21122737/iowa-democractic-...
...was distributed via a test platform with the financial backing of former Clinton and Obama / recent Pete Buttigieg staffers...
https://apnews.com/5232ce5601996c1de440806ad30fa4fb
...has likely put Apple in the position of being compelled to more actively police what goes on in test apps. I get the knee-jerk tendency to blame corporate oppression of indie developers since that is usually what we see from the Googles and Microsofts of the world, but Apple has little monetary interest in kicking a successful app developer off of their ecosystem, unless that app developer is blatantly flaunting civil / criminal statutes or trying to scam Apple out of their cut of the profit.
If I had a to guess I'd say this guy is doing both.