I knew you'd grab onto this,like you do most things.
Yes,rendering a little fat,adding some smoke[without oversmoking],giving some color/just smoked look.
If they are the precooked,regional grocery product[around $2/lb] I try to dress them up.
A few slits with your paring knife,around the sausage and just thru the skin,gives some texture/slight change in flavor.
Makes them look like $4.50/lb sausage.
I rarely cook for a group,that I don't toss in a few pounds of these.
Cook with the other meats,slice into bites,toothpicks,and a couple dips.
Keeps the wolves at bay.
Todd may chime in,how a real caterer approaches these.