The only way I can see this being dealt with, is if it is added to the rules. Then we can do regular checkups to see if the players respond, if they don't, give them another chance or two, if they still don't then kick them or something.
Alright, so ever since I found this post I have been spending my life on youtube watching videos of this game, so if I ever manage to get this game I will say so. (I got to retry my attempt on HoI4 in which I allied my self with Germany and took over Europe > ALL HEIL VICHY FRANCE)
The adv rep gun and the normal rep gun could have a recharge thing like the purchasable rep gun, but their "ammo" could go up to 1000 and instantly recharge.