I think it has some value for organising communities. It seems a lot of people do not realise that there are other Hivers in their area. I know with the Nigerian list people expressed surprise at how many there were.
I've gained a lot from local meetups and plan to organise more. I do the Brit list monthly, but I want to leave it up to the local communities to manage the rest.
It's easy to find the obvious accounts, but as I say, the metadata is inconsistent.
I am considering taking on some of the other big ones like Indonesia and Venezuela, but others will be by request.