Are these good for anything? They are Outlaw Decoys. About a dozen mallards and a dozen Canadas.

Yep, I use several Canada Silhouettes in my large Goose spread. And have used only Silhouettes during Resident goose season. I like using them. I almost exclusively hunt public land so often have to cart, carry, or paddle my decoys in, so they are great for adding numbers and give the illusion of movement to circling geese. I have some duck silhouettes like yours too, but have not used them other than for confidence decoys near my Sandhill crane decoys.

They also work well for covering layout blinds and my layout boat when there is no other cover.