"90% selfish voting (either by support-for-support votes, selling SP delegations, self-voting, etc, they're all effectively the same).
10% non-selfish voting."
It is sad to understand that doing this is the only way to keep up with others but what can we do?
No matter how much we deny, we are all here to make money, aren't we?
Anyway, I hope that some day in the future, things will change.
There are better ways.. check out the rationale at the top comment :)