The (expensive) services will be of course D&D games. As the supplicant's character increases in level, more bits of the inner truth will become apparent, or be revealed by the treasures and monsters that are encountered. Higher level characters will be given the ability to buy magic items, spells, weapons etc. The opportunities for religious consumerism will be endless here: dice, dice bags, books, etc. At a certain level, the supplicant may be invited to become a game master at a low level. And after years and years, the top level (probably 33rd as in Masonry) could be achieved, after about $150,000 and a lot of work. The mysteries of character generation, character types, alignments, and the existence of "dungeons" could be explained in stages of symbolic meaning tuned to the supplicant's level.
So I could fuse pop culture, childhood nostalgia, Scientology, the New Age, shopping mall "wiccan" distaste for Christianity, the will to power, consumerism, multilevel marketing, geek culture, the current Tolkien mania, and every mythic tradition that D&D itself grave-robbed.
And if there's girls there, I'm going to do them.