I’ve seen a few lemmy discussions on this so far, and honestly the best option I’ve seen is to just ignore Place.
To participate, even to advertise lemmy, we would have to engage, which is what reddit is looking for. Even then, admins will likely take the reigns and prevent any serious effort from being fruitful. There’s just not that much benefit and plenty of downside.
It’s attention seeking behavior. Ignoring it and letting the event fall flat (or at least as flat as is in our power) would send so much more of a message than “join lemmy” or “fuck spez”.