Just spent a couple hours pulling my hair out trying to figure out why Moonshot wasn't limiting pricing data to just the SIDS I had specified. Turns out SIDS will only be used if UNIVERSES isn't specified. This makes sense when I think about it, but I was originally thinking that I'd first filter by UNIVERSE and then filtering from that list by SIDS.
Might be a good idea to add a place in the docs that covers which params can and can't be used together.