When you really want to have lots of meth on hand (not selling it) to unlock something, the cop stops all of your dealers from selling. Without the dealers selling your stockpile of meth really grows fast.
That was the only point I could see, but I guess I'm so far out of balance it doesn't matter. My product on hand is going up just as fast as my cash. Guess I need to hire more dealers. I'm getting 50 per second from master dealer though. Have 45k dealers, 21k g/sec, $560k/sec.
Yes higher purity means more money per gram. I'm doing 2nd attempt on 60,000,000 expansion, or maybe I'll wait a minute and attempt the politician at 100,000,000g.