You're only making more on the MAPD for the first year, and only if they are new to that type of plan. Other than that your Med Supps should be paying you more.
That's not true in Florida or any other state where UHC has the lowest cost Med Supps-Florida Med Supp commission is about $215, MAPD $222 renewal. Adding a PDP plan makes Med Supp a little higher but has the 6 year limit.