@sbi-booster is an official SBI account (we respond to comments from it), but not an official voting account. The difference is that the upvotes from it are not linked to our regular value mechanisms, and are not removed from your pending vote balances when received. This allows us to provide discretionary upvotes on comments, provide extra on-demand support in our Discord to members with 40+ units, and grant a little extra by random selection when the VP gets high enough.