We do this at my store. There a few different reasons. For grocery, they send our store more POGs than there are end caps for. But we are still expected to tie them all. So we use S-ties in this situation. Another reason would be if we have too much clearance and we need to keep several end caps of clearance, which means we don't have room for the POGs, so we S-tie them. And sadly, the third reason we might use an S-tie is if we run out of time and it gets to Saturday and not all the POGs are going to get set. S-tie the POGs that are left so we don't get dinged for not getting all POGs tied.