First place I would start if I were JO and Scott. I would sit down and try to figure out the same classes for both series outside of ATVs. If that cant happen, then you can still move on with the idea of double points.
EF and CTMX, pay double points, and count in the overall races for OMA points. Malvern and BC pay double points, and count towards the overall points for Buckeye series. This concept just does not seem difficult, but for some reason it is. So at Minimum, if double points can not be done, then, at least make sure the races (all 4 of them) count towards the overall points for both series. That will at least help get these guys to travel north and south for these races.
District 11 used to have a handful of double points races through out the year way back in the day. I know not many here are old enough or been around long enough to remember, but it used to be done.
Look, 500 plus show up at a normal Buckeye series race. But yet the day of the BC battle race, I could have counted on two hands the guys that were buckeye series regulars that were at BC for this years battle. I thought the goal was to make these four races the biggest four races of the year in Ohio. In order to do that, we need to do something to entice guys from both series to race all four races.
And to the "every other" weekend rider Connie mentioned. Usually those guys don't ride enough races to qualify for points awards, or we want them to make these no miss races as well.
It's just marketing 101. Getting your consumer to want your product.