This game is pretty new but there are already a bunch of good custom maps out for it, most people still seem to prefer MP or the default maps. The three main factors I see for this are the lack of loot, the inconsistent difficulty and the amount of effort it actually takes to begin playing a custom map. My suggestion is to take some highly rated custom maps and add them to the game proper. Give them a level requirement and loot table just like any other adventure. Maybe add a new one each week and they stay available for 4 weeks or something. The loot makes people more inclined to play them, the new ease of access removes the barrier stopping lazy people from playing them, the level requirement helps to balance the difficulty and all these things together will result in more people having more fun. It also gives some recognition to the hard working mapmakers.
That reminds me, I never posted my idea about hosting custom scenarios. I'll do that now: https://forums.cardhunter.com/threads/suggestion-custom-maps-for-fun-and-profit.3958/
