I am a member of expats in isaan on fb. Have been for a long time. Despite the high membership, its not really that busy. A few posts per day and from a small number of regular contributors. Well modded. New members come on to ask questions and then generally fade into the background. I hang around for the same reason I do here. I visited Korat from 2005 and lived in Korat from 2014, and until recently my other half owned a house in Korat and for about 14 years worked in Korat, although originally from Khon Kaen, which is another reason to hang around on the Isaan fb page. The other year I was hosting family and friends for a Christmas Eve meal in Khon Kaen, when I realised no mince pies would be available - shock, horror! A quick post on the fb page and I was directed to an American producer and a few hours later, I had enough mince pies for the evening and the hotel was happy to serve them to my guests with cream.
Mike Newman is a member of the Hua Hin forum, as am I. He is an 'irregular' regular contributor. Writes interesting posts about the local area, cycling routes etc, Cha am eating places and beer! I have been on there since 2005, I think. I first visited Hua Hin in 2000, on my way back to the UK, having spent the millenium in Oz.
I followed his travel 'blogs' on various forums and always admired his photos and writing. He doesn't really do those any more.
As for KF, I think the first thing to address, is how to increase the membership? And if that isn't possible, then you have to consider throwing in the towel. What you can get from forums and not fb, is continuity, a depositry of knowledge and wealth of experience, all stored and available to tap into with a simple search facility. Fb is very much here today and gone tomorrow. It's all throwaway stuff, even the good stuff as it disappears into the ether (unless you save it) and you have to scroll deeper and deeper to find older material. It's a hassle.
In Hua Hin, the membership of the forum has declined, but it still does get new blood, albeit not as frequently as before. Hua Hin is a tourist town, albeit a mainly Thai tourist town, and the decline of international tourism has had an effect on the forum.
Korat is a town of spread out farangs with no obvious centre or meeting points, apart from Malls, it always seemed to me. I know that years ago, people would say Joho was where most farangs are based, but I don't believe that is the case any more. Somehow you need to reach our to the farang diaspora. Years ago on the Hua Hin forum, when it was actually called Hua Hin after dark, and the name change reflected the change in the profiles using the forum and what they wanted from a forum (something to think about?), what they did was create a load of stickers advertising the forum and stuck them all over the place, on cisterns in bar toilets, to wherever, and then ask people to provide feedback as to where they had been seen, as well as pics. It was great fun. Not sure if that is possible in Korat? Things did seem 'lighter' a few years back.
Anyway, just some ramblings.