Just guessing but: -I don't think they are aiming to make a profit -They have a lot of corporate sponsors -Economies of scale: large membership, large building

Just guessing but: -I don't think they are aiming to make a profit -They have a lot of corporate sponsors -Economies of scale: large membership, large building = lower fixed cost per head -Most (all?) of the staff are member volunteers, so low (no?) labor costs. -It's in a converted industrial warehouse, not A1 office space, so it's probably fairly inexpensive rent, relative to a place like PARISOMA (which charges 3x more).