Hi Laurie,
Great question. I’ve been following some of the concerns about this change, and I can certainly see why they are important, especially the idea that this somehow supports LinkedIn.
On the other hand, I personally think that this is a good thing because it promises the potential of broadening the Trust’s audience, which it desperately needs. The old Forum was a pretty quiet place where, for the most part, people who supported orthodox views on the field sustained these perspectives. (There were, of course, exceptions.) Voices that were pretty much absent included the social sciences (e.g., folklore, anthropology, sociology), urban and regional planning, geography, etc. LinkedIn has the promise to bring more of these voices into the discussion, including people with more diverse identities, which I very much welcome.
To be honest, LinkedIn is the only place where, when I post a topic on historic preservation/people and place, I actually get engagement. People read my post, react to it, and most importantly, make comments. When I post the same content on the Forum, it was usually silence. Same goes for Twitter. (The FaceBook preservation practice forum can get good engagement, but as a private group, it more of preservationists talking to themselves, which isn’t good for the field.)
So yes, LinkedIn is a for-profit company that is making money from my participation on their site (through advertising), but, on the other hand, I do get this engagement.