What do you mean "makes this very unlikely" they're literally doing it, there's mountains of evidence that it's actually happening. They haven't really been trying to hide it the only real argument is if you somehow get a pass on a charge of colluding if a software platform is involved.
Two economists walking, spotted a $100 bill on the ground, and did not pick it up under the reasoning that if there were really $100 on the ground, someone else would have picked it up already.
That’s a strong claim: can you expand your reasoning and provide some data? They provide a lot in the case so I’d expect some specific examples of why you don’t agree with their claims.