Just because they're "low metal" don't mean they couldn't have planets, just less of them, see http://en.wikipedia.org/wiki/Methuselah_%28planet%29

Why is everyone here taking "low" as "no"?

We dont have a Hot Jupiter here either and these are mostly arouund stars with higher metallicity than our Sun.

They are not common, just we can see Hot Jupiters very easily.