It’s a self-fulfilling prophecy. If you force people to differentiate to compete, then there will be more innovation and diversity. That also means there’s less incentive to create “yet another journaling app” because you don’t know what is “too similar” for the reviewer. (Real example: “you can’t list this because it has a similar feature to X” rebuttal: “X has many features, but we are focusing on simplicity and this feature is our only feature we intend to support. For privacy, we won’t sync or do any of the other fancy things X does.” Their final response: “it’s still too similar” — all paraphrases). In order to compete in established verticals, your app has to be nearly feature complete and “different enough” as well as be completely polished. This is quite a gamble when starting out.
> search "2048 game" and let me know how many similar games they said no to.
I don’t know how old the rules are for this. I just know it currently exists. Also, it’s possible that a number of them were submitted at the exact same time and there was a race condition allowing the market to be flooded.