For years the common wisdom has been to never blast your money site... But always give it at least one small blast. Meaning about 500 to 1,000 AA blogs and profiles. You can go more than this, but it gets more risky. There's two reasons for this. 1. It increases your IP and link diversity, just not your link juice. If you're doing no direct blasts, it's hard to get great IP/link diversity compared to an older website or one getting natural backlinks. These are ranking factors. 2. A small blast isn't enough to get penalized unless you're terribly unlucky. You can even do major blasts and never get a penalty, because G is inconsistent.