It is very common for companies to not release MAU numbers especially in their initial years, even if they are being very successful. I challenge you to find Gmail's MAU numbers released in the first 3 years of its existence.
If you can't understand why MAU is a sensitive metric, then yeah I understand why you make up theories in your head why they must be "covering up" something.
If you can't understand why MAU is a sensitive metric, then yeah I understand why you make up theories in your head why they must be "covering up" something.