The other use is to check your cake is done. Insert it in the middle of the cake, if it comes out clean, then it's done.
I recently enjoyed using my skewer in frying beer-battered fish. It's always a challenge to dredge anything in flour then dipping it in batter without some coating sticking to your fingers. Dish will still taste amazing I bet, but a missing patch is just not pretty to look at.
With a skewer, my problem is solved! The only mark it left is a tiny hole. Aside from it keeps my hand clean, keeps the batter and flour evenly applied, any excess batter drips easily making the coating just perfect!
I will use it then next time I cook tempura... I can't wait!