Dune: CHOAM & Richese

Yes. Each turn, CHOAM collects 2 spice for every faction in the game before other factions collect Charity; if another faction collects Charity, that payment comes from CHOAM’s spice (p. 7).

The token counts as one force for effects while hidden, even if it is the 0 token. Richese pays to ship one force, then may reveal the token before battle to place the number it shows from reserves; a token is also revealed if caught in a storm or by a worm (pp. 6, 10).

No: Richese keeps a separate cache of 10 cards. At the start of each Bidding Round, they must auction one cache card; they receive the payment if it sells, and those cards cannot be bought or acquired with a Karama (p. 5).

No. The cards must be duplicates of the same card; for example, Snooper and Shield Snooper are not the same. At the end of any phase, CHOAM may discard surplus duplicates for 3 spice each, or discard Worthless cards for 2 spice each (pp. 7, 10).

Yes, but the effect depends on the advantage: for example, Karama can stop CHOAM collecting force payments for one battle or Richese auctioning a card at the start of bidding. The rulebook’s Karama reference lists the specific effects (p. 12).