The game (Beta) is currently in the "Mechanics" testing phase. You can expand on the Quests available via Research but there is a minimum # available to allow immediate testing of said Mechanics.

Same for Recruiting, but they also come with certain levels of Charisma needed for some recruits, and seems to be affected by how long in game time (guessing) it is before you meet the Hero in question. They seem to recruit others of their kind to form larger more formidable groups...or the groups are simply a random element generated at world creation time.

I prefer to think that they band together to prevent the Trolls from taking over. LOL