Either Armenia or Azerbaijan could host it, Armenia endorsed Azerbaijan in exchange for them releasing another portion of hostages (the 2020 ceasefire agreement says that all PoWs must be released, so they are hostages ; and of course people captured after that are).
So in this particular case, apparently, kickbacks did not play a significant role. Which is actually rare for Azerbaijan.
Maybe they’re hoping for a “This is what your country will look like if everyone continues to ignore this problem” reaction from the attendees?
Not necessarily hoping, but this is a useful effect actually.
Boris Johnson also knows a thing or two about homoerotic stuff, UK good schools and all.