So you need drawbacks and boring things
to feel yourself as a part of cabal.

Is it possible to make things intresting so
players would enjoy them,
or it is necessary to obligate them with boring job
( which is close to stupid as it doens't add much to the game )
just to make a cabal?

Notice, item retrieval and raids are "good" parts of cabal life,
sometimes you may be pissed with stupid deaths and gangs,
but, in general, people enjoy them.
And I would call it "obligation and responsibility" to the cabal.

But things like donations and emptifying skins all around the world
are just plain stupid :)
I would accept them only if somebody can't produce better ideas
for cabal mates to prove their loyality.

You don't have to repeat other's words
Just ask yourself and your heart honestly,
does this or that thing make the game better for you,
or it is just the thing you have to do because it is necessary
in current state of cabal policy.