I agreed to try LinkedIn Premium for a free month. It advised me that I would be advised a week before the first charge on my credit card was made, to give me a chance to cancel if I did not like it. I waited for the advice assuming there would be an e-mail. Nothing arrived and I learned my credit card was charged when I happened to check my credit card account on the exact expiry date of my free month. I did not find LinkedIn premium of any use to me personally, and feel like a sucker for believing that advice that I would hear from them. So just a word of warning not to rely on that promise to advise you a week before they grab your money.