You call growing from zero to tens of millions of MAU in 4 years "very weak"?! Ridiculous. You are wrong, nobody seriously outright rejected Twitter was growing. The worst critics said was "Twitter is not growing as fast as they claim, but they ARE growing" or "growth has slowed down, but there are still growing".
I can use any other example to prove that not releasing MAU doesn't mean something needs to be hidden. I quoted Gmail earlier because this is a good case of a growing product whose MAU needed to be kept secret due to competitive reasons.
I can use any other example to prove that not releasing MAU doesn't mean something needs to be hidden. I quoted Gmail earlier because this is a good case of a growing product whose MAU needed to be kept secret due to competitive reasons.