I received some whale's upvote on the comments which I made on their posts but hey never upvote my posts. The concept of proof of brain is not working at all. Nobody upvotes a post if he/she don't find it profitable. Most of the people follow whales and automatically upvote them in hope of earning curation reward.
HF20 the much hyped change, proved to be nothing more than system update. It has not touched the issues of reward pool siphoning. This is very disappointing.