participating in a classa action suit

I rec'd a letter from a law firm who filed suit against nationwide insur. Nationwide admitted no wrong but settled the suit. I assume since the lawyers had my name and address nationwide included me in a list of people who had insurance claims during the time period in question. I am to sign the form and return if i want to be included in the payout. I am still with nationwide auto and homeowners insurance. My credit isn't so great to go insurance shopping and plan to stay with Nationwide. Will they be informed I applied for any money and hold it against me in the future, possibly cancelling me out of retailiation? Can they legally? Or simply "find a reason" to cancel to be ugly to an "ungrateful" client who wanted part of the settlement. If I am entitled. - Is this your question? Add additional information