Every rockstar release since the first GTA had a wave of free publicity. This is no different.
And those who participate in it (including my opinion) is exactly what Rockstar wants to stop you from remembering that Rockstar retaliated against unions, pushed for crunch times, and pushed for digital-only games.
Maybe it is, maybe it isn’t. I don’t think the game needs it, though. It’s easily the most highly anticipated game in decades. Going through the steps of faking a leak is just wasted effort.