I don't want Ambrosea to have been based in the place for very long.  I'm thinking her group has been much more nomadic, traveling here and there, and making friends (and maybe some enemies) where ever they go.  It's possible she'd have visited Gomorrah in the past, having had maybe just one or two opportunities to get freaky with Ruth, before passing on to some other place.<br/><br/>The drug that Ambrosea gives to her cult is a special method of fermenting cacti and extracting certain chemicals that gives a hallucinogenic effect.  It's a method that she learned a long time ago, and has never tried to teach anybody else.  She's rather secretive about it.<br/><br/>Despite the stupor that would overwhelm her people in times of surplus, they would still remain sociable, able to recruit other persons, preach to them about the goddess of colors, and perhaps pull in some donations.<br/><br/>Ambrosea's cult is centered around her, as the goddess of the world of color.  People that use her drug are able to see the bleak and colorless arid, desert landscapes as a colorful world.  Due to Ambrosea's high weird ability, and the effect she has upon the psychic maelstrom, when people use this drug to temporarily 'enter the world of color', as she tells them that it enables them to do, they see Ambrosea as a beautiful, bright, luminescent being of many colors.  Prolonged use can even make users have milder versions of these side effects, even when they are not abusing the substance.