If the goal is to get new players to join the game because half of the leagues are empty, creating a subreddit in Reddit would do wonders, in my opinion.

Some other GM games have them, and it's great to see the communities they have created. Here's an example (not spam, I just enjoy the game and the community is great there): https://www.reddit.com/r/BasketballGM/

People post about their own teams/players, give advice...

I understand it's a bit redundant if there's already forums here in MFN, and I don't know if jdb would allow it/if he's against it, but I think it would bring new players to the game.

I guess there's some cons to bring new people this way, but it's sad to see owners leave MFN every day... what do you think?

well, start one.

yup. be the change you want to see

Google uses Reddit as the priority data source to train it's AI, which is all the more reason to buy 3 months of non perishables.
Ha!