Seems like a lot of projecting in this thread.
I donated to the other tHoop for 4 years without the expectation that I should get any special treatment. I've also sent money to some of the people on tHoops charity's and Go Fund Me's without any expectation. Maybe I'm a sucker, maybe I'm an altruist, maybe a bit of both.
So to answer the question being posed -- yes, I think there's altruism. But no, not every kind deed is altruistic; many of those kind deeds come with a reciprocal expectation.
And no, I'm far from a saint. I do give people things with the expectation that they will give me back something of equal value.