Facebook has dozens of pinball, arcade and coin-op groups. The EM PINBALL group has almost 6,000 members. I spend most of my time in that group, as well as in the Prewar group and the Woodrail group. All of the modern pinball manufacturers have a FB presence.
Most FB groups are free of drama, in part, because the "downvote" option is nonexistent and most administrators don't tolerate negativity.
Enthusiasts are sharing information and constantly posting hobby-related photos and videos. Pinball machines are bought and sold daily on these groups and in the Facebook marketplace, which is essentially a safer form of Let-Go or Craigslist. The FB connection has a personal vibe so sales seem to happen rather swiftly. Also, you can instantly become acquainted and learn enough about each other to determine the integrity of the parties to the transaction. This feature is important because it facilitates sales, helping both buyer and seller.
Even Google's RecGamesPinball seems to have migrated to Facebook. While I understand the privacy and other concerns about FB, I personally enjoy the plentiful pinball options, after 35 years in the hobby. Pinside, Facebook, RGP, KLOV. . .it's all fun. I don't know whether people are using their personal pages more or less frequently these days. I do know that pinball has exploded on Facebook these last 5 years and it's growing at a geometric rate.