If the whale (or any other user) upvotes just his posts, it is ok, in my opinion. Every user has a different frequency of posting, so i think that CSI doesn't say much about the user. Somebody posts 5 times a day and for example I post about 6 times a month, so I have better CSI and I dont really think I am more generous.
The only think I do not understand (in overwhelming majority of cases) is selfupvoting in comments. I really dunno what I should think about people who do this.