I don't think the ACC will be alone when it comes to splitting the 12 team Playoff money. That's too much money for OSU, Michigan, PSU, USC, Bama, Texas, Georgia, etc. to not be greedy.But why do that? It's just going to p*ss off half the conference and financially reward the schools who are most likely to bolt for a new conference the second it becomes feasible.
If it's merit based it doesn't just reward FSU, Clemson, etc. it rewards any school that put teams in the Playoff. But payouts could be structured a lot of ways. The FSU AD could push for TV viewership as a merit metric. They could also use weeks in the top 25 ranking as a merit based metric. Conferences could use academics as a merit based payout.
IMO if the majority of the ACC doesn't throw Clemson, FSU, etc. a bone in the next couple years, there is a 100% chance there is no ACC in 2036. If they bend now and bide their time, who knows what CFB will look like in 2030 and then 2036.