Entitlements from derived product pool not able to get upstream

The subscritption id is not on the stacked pools that are created for derived products.
The entitlements for those pools do not allow Thumbslug use as the upstream
cert comes from the subscription.
The default join type is an inner join, which should filter out everything without a sourceSub.  If memory serves it's a bit faster too.  I'd probably get rid of the jointype unless it's failing otherwise