> Additionally, our calculation of mDAU is not based on any standardized industry methodology and is not necessarily calculated in the same manner or comparable to similarly titled measures presented by other companies. Similarly, our measures of mDAU growth and engagement may differ from estimates published by third parties or from similarly titled metrics of our competitors due to differences in methodology.
They covered themselves very clearly, and Musk has no standing here. He knew this, and decided to waive his due diligence and buy anyways.
[1] https://www.sec.gov/Archives/edgar/data/1418091/000141809120...