What sort of stuff is on there? Can you leak anything?
It is surprisingly boring. If you have seen The "Top Secret Inner Circle" board on KF its very similar content wise, except with a few serious threads.
The main threads are:
"Lol look at this spiderman faggot" - Basically anything cringe on the Farms for people to laugh at
"CorbinDallasMultipass Memorial Thread" - Asking why users were banned (and Null ballwashing too)
"/r/incels" - More of a general chat but its quiet and usually the Spiderman thread gets used for that.
There are some quieter main boards like "/r/socklovers" for discussing potential sock accounts, or "/r/Physical_Removal" for complaining about staff removing posts.
The rest is either dead (including interesting boards like /r/FuckYou for users you don't miss) or honestly not worth talking about because its so boring.
There's also quite a few infighting boards like "Hollywood Hulk Hogan Enslavement Syndrome" too, but these usually die out fairly quickly.
To give you an idea, here's an image of some of the threads you can expect to see in the Supporters board:

In the end its mostly used by paypiggies to insult other users of the site, as the Spiderman thread is the most active thread there. There are no rules in Supporters so anything goes, you see stuff that would get you banned on the rest of the site (but only if Null likes you).
If you want me to find posts specific to you guys I can have a look. I hope I was able to shed some light on it for you.