When they say they will find the best coupon, they are lying. They will present the coupon their customer want you to see.
When they ask you if you want to check for coupons when you used an affiliate link, they will also simulate a click from you on their own affiliate link to steal the commission.
No wonder Paypal bought them 4 billions. It's a scam, it's a theft, it's disgusting. Run away from them, search for better coupon though any search engine and give money to the right person when you click on an affiliate link.
Source (among others) : Exposing the Honey Influencer Scam , youtube