How Does Multiplayer Work in BL3?

So I am noticing a lot less people joining games when I leave it open to the public in BL3. I remember back in BL2 it usually didn’t take more than a few minutes before I had almost a full group join up. Now it is a very rare occasion when someone will hop into my game.

Even when I do the matchmaking I usually only ever end up in a game with one other person.

Is there just not that many people playing on PS4 or what?

I only have match made,and 3 games so far,was just two of us,every other game,3 to full. I only do proving grounds though. So probably why my luck is better.