Not sure where to start here. You could have found Honey advertised basically anywhere on the internet, not just YouTube. YouTube users are common across most of the developed world at this point, so it's probable that there are millions of YouTube users that are more intelligent than you or me. And what you said implies you do differing levels of due diligence for the services you sign up for depending on the platform you heard about them from, which is ill advised; regardless of where one found out about Honey, you should have questions about how their business works. Someone who has been around the block a couple times would have deduced that a business that clips coupons for you is doing something to make money, and since it's not obvious what that thing is, it's almost certainly something shady.