Maven's Invitation

I'm level 96 80% exp and have not gotten more than 3 Maven's invitation: The atlas. I'm stuck for Maven's progress. I've been talking to my friend and apparently he says they are super common. I've ran probably 100+ maps since my last invitation drop. I am dropping the feared/forgotten/elderslayers invitations so i'm unsure what's going on.

https://imgur.com/a/m4aIA1P

RNG. Just buy the invitations from other players. The people who run Eater of Worlds or Searing Exarch influence can still drop them but have no use for them.

I got like 20 rotting in my stash that aren't selling. If you're on trade they're dirt cheap. If you're SSF try spamming map bosses as fast as you can.