You can have multiple divisions with no restrictions. For a few years, CAX ran unlimited Herb with three divisions. Modern, solids state and EM/ classics. There was no hard line as to which game went in which division other than for EM’s. You do need more games for this, but if you want everyone to have a chance to play everything, that’s one way to go.
After a couple of years, it became obvious that modern was the most competitive division. So players that thought they didn’t have a chance in modern could skip that division and stick with SS and classics, where they felt they had a better shot at finishing in the money.
I wonder what others think what an entry (single game) should cost these days. While in don’t think we should price anybody out, I’m thinking 3-$10 and 7-$20 should be about as low as you should go. $2 entries are too low IMO.