Featured gamemodes for custom games only?

A lot of people love the featured gamemodes, and i bet a lot of people were sad when those gamemodes went away for a year or two (all for one, urf, doom bots, etc). I was thinking what if you can do any featured gamemode but only in a custom game where u dont earn ip or exp, even if it classifies as a full game? All of it would be for fun, and i was wondering if it is possible.