You don't want to invest your precious time to have a huge fanbase only to see it abused by all the members. If you do it has to be done right. And the first thing would be to only organize yourself with other top developers. This might sound arrogant but it is basically the same what Ketchapp and all other publishers do. If you have "everybody" participating in this group then you will have to advertise later bad quality games which will make your fanbase go away again or at least, it will bother them a lot. And what you want is the opposite. Not spamming them with low quality.