I'm probably not up with the times, but I don't really see many actors in that film that would be classed as A-list (although the definition of that is somewhat loose).
I really like Keanu, and he seems like a great guy, but I don't think he getting paid $20 million a film, although his popularity seems on the rise again (but perhaps that is just on Reddit). He was reportedly paid 2.5mil for some of the John Wick films, and you'd have to imagine he is the top paid in this latest matrix film.
Regardless, I have already said I don't know much about the industry, and I haven't even seen the film, so it is all just speculation on my end. However, I'm willing to bet that a significant percentage of the reported spend went to subsidiaries charging healthy margins, which is common in the industry to help cut into the % of profits the studio would have to share with people as part of their contracts.
My SO is a huge The Walking Dead nut. There was a couple seasons (episodes?) that (from the outside) looked more like a vehicle to sell cars (pun intended) than to advance the storyline.
'Memba new coke? Stranger Things did, too!
Sure, go watch ET - there's obvious product placement too - what was it, pizza hut? Pepsi? M&Ms? It's been a while, but it was rarely the McGuffin in the storyline.
Did ET want to call home or did ET use the latest 5g sprint network on ETs new Samsung Flip mobile, exclusively at Sprint stores, everywhere, to call home?
It's so transparent, and then to have the audacity to charge $30 to view this 90-minute product placement informercial.. and yet the masses gobble it up and it's just a feedback loop of "Well, it's working! Let's _double down_ next time!" <Queue the KFC commercial>