Hi Kevin,
I've only used the pic posting system once or twice and whether you realise it or not, it is complicated compared with Facebook which is undeniably a competitor to this forum. Why is it necessary to create an album before photos can be posted? Why can't I post directly from the photo albums on my phone or computer? On Facebook (and you have said before you don't use Facebook and never will) it is a simple matter of clicking on the photo icon, select the shot you want from your own album and Bob's your uncle. Then there's videos and that's even worse. I actually have to have posted my video somewhere on line (such as You tube) before I can get it into my post here. Anywhere except Facebook it seems because when I did it that way some people complained that they couldn't see the video because they aren't on Facebook!
The fact that you ask for exactly the same posts as the group on Facebook did, you get one response and Facebook gets more than you can poke a stick at should set alarm bells ringing for you as a site administrator. Why do you think there is such a dramatic difference? Because you don't use Facebook, and therefore don't understand your competition, I'll give you my opinion.
This forum comes across as being primarily for people with old cars looking for solutions to problems they have with their cars. Facebook, in comparison does that as well as offering a social connection. If I want to know how to fix something on my car, I just ask and I get a dozen responses, within hours, often with photos and detailed instructions from others who have already done it. I'm talking here about my SH Forester. I don't have to go trawling through old posts like looking for information in the reference section of the library. If I want to go out for a day in the bush I post my intention and so far, there has always been someone else who turns up.
Don't get me wrong, I've enjoyed reading some of the posts on this forum (and I congratulate Scalman for almost single-handedly keeping things going at times) though I do find it tiresome reading more about non-Subaru vehicles than I would like and I'm not suggesting everyone should abandon ship and move to Facebook. Some people are happy here and good on them. Whatever floats your boat. I do think, however, that you shouldn't ignore the fact that the site is quiet. That's a symptom of an underlying problem. Don't put the onus on the members for not posting. There's a reason why they're not. Find the reason and fix it.