It's was organized by the CCP commie Tiongs, most of the ones who were in attendance were from the mainland.
Because Miss Taylor Swift conspicuously skipped Hong Kong as a location for her concert tour, those triggered Tiongs ('Hongkies') saw a need to hold another event to boost the 'prestige' of Hong Kong.
Messi saw through that bullshit.
Expect more companies and celebrities to boycott China and Hong Kong in future. The only thing that can save Hong Kong is: 1) the collapse of the CCP regime and 2) Hong Kong independence.