Your comment gets to the heart of the issue in cases like this and related horizontal merger cases: how broad is the market? If Facebook convinces the judge to

Your comment gets to the heart of the issue in cases like this and related horizontal merger cases: how broad is the market? If Facebook convinces the judge to accept a broad market definition, game over for the FTC. If the FTC convinced the judge of the reverse, bad news for Facebook. The judge has basically told the FTC that they did a terrible job exactly on the market definition issue. This is a big problem for them. I also don’t see why a judge wouldn’t accept something like “online communications platform” as being the right market in this case. Then all of the players you list are plausible competitors and the FTC’s job becomes much harder (or IMO impossible).