While auto insurers may not like the metaphor, sponsorship activity in the insurance category shows no signs of slowing down.As they have in the past, Allstate Corp., State Farm and other property/casualty insurers use sponsorship to engage consumers, build consideration and generate leads in a one-to-one environment.While those objectives haven’t changed, the road to those goals has taken some twists and turns. That includes a shift from brand-specific to product-specific ties, more inter...