For the sake of avoiding linking to reddit, basically Spez accused the main Apollo dev of blackmailing them for 10 million to "make the drama go away". But the call was recorded by the Apollo dev and it turns out Spez took one interaction out of context and even backtracked, since in the original call he even straight up said "oh sorry for misunderstanding".

(The apollo dev said that if Apollo generates so much load on the servers why not just buy it to put an end to it. Spez took it as a threat, the Apollo dev explained himself and Spez apologized like 4 times for misunderstanding)