If you've read up on lore and grimore, you'd know that the Agents of the Nine is the name given to the individuals living past the asteroid belt (reef) in the gas planets (don't ask me how) and the moons of these planets. Maybe they will have a second agent of the Nine who sells different things, each week and maybe have the reef version of Xur come on a different day and have a higher chance to bring a new HOW dlc weapon