It's complicated, and knighthood is a special case. As a knight you are expected to physically intervene, to defend this forum, should its existence or its mission come under threat. Technically this applies to all noble titles, but since higher ranks come after the candidated has promised solid financial support the oaths of protection are usually waived. CoTI is not a paramilitary organisation after all, whatever rumours might say.
The highest ranks require the promise of safe haven in and transportation to other star systems, neither of which are currently feasible with our technology. I can only presume that such promises are purely symbolic in nature.