I was just going to delete this email from PayPal but just happened to read it.
The link was unique to me but it seemed fairly generic and not based on anything. I do not have a business and just use PayPal as a normal person. The subject line is "Share your feedback" and reads as follows:
We'd love to hear from you.
At PayPal we are always interested in learning from our customers. We value your opinion and would like to invite you to participate in a survey about your financial needs and preferences.
Your feedback will help us to enhance your PayPal experience. Thank you in advance for sharing your thoughts.
To complete this 10-15 minute survey, simply click on the button below. Survey period begins July 12, 2018 at 12:00:00 a.m. US PT; Ends July 26, 2018 at 11:59:59 p.m. US PT.
Upon qualified completion of the survey, we would like to offer you Starbucks coffee on us. Please allow up to 4-6 weeks to receive your your $5 Starbucks virtual gift card. We will email the link to download the incentive using the email address used to invite you to take part in this market research opportunity. Reward Terms and Conditions [paypal-survey.com]