Large insurance companies analyze a huge amount of customers’ personal data, such as social media posts, credit scores, and even your web shopping habits. Then, they churn the data through a proprietary algorithm that estimates how likely you are to shop around or just renew your existing policy each year. By doing so, they can increase your premium just enough to raise their profit margins without attracting your attention and prompting you to shop for a new policy.
I have had Progressive for years and have never had any trouble. My car got plowed into by a deer, and Progressive was reasonable to deal with. Their rates are also about the best I can find. We bundle in our home insurance (through some licensed third party) and save even more! Our rates just actually went down this past 6-month period which was a pleasant surprise.