Lol! Exactly, life always has a funny way of rewarding those who are consistent through even the toughest times. I think that the decrease in spamming may have a small impact, but I don't think that it's a very large one. Most of the spammers had little SP and thus, little influence over the rewards pool.
The curation rewards on the other hand probably have a decent impact on the pool. Nothing too crazy, but I'd suspect a few % points could be attributed to that. Most people are getting smart and voting after a post is 15 minutes old, but there are still some smaller accounts who vote before that.