Most preworkouts I use have it in there.
However, I've split it before using an additional 5g pre and 5g post. I noticed no benefits from it. I've also mixed the 10g into my intra-workout BCAA/BA blend - again, no noticed benefit.
So, other than what I get from a preworkout product, I will not use Creatine monohydrate preworkout (CN, however, is simply amazing).