I must admit fraudsters do make money online and behind this way of making their money is illegal and contempting.
If a fraudster knows your email address it's going to be the best communication source he or she going to have to steal your money offering a service or goods to buy. However would you be blinded by a bigger company like Amazon or PayPal giving you email to log into your account yes you maybe and tempted to respond to one of their email and the score is your account details have just been hacked by a third party fraudster. Especially your credit details are now in their hands. They can use this credit details to steal your money or identity.