While there are countless problems with high-priced leadgen charlatans flogging crappy leads, one of the common issues is articulated nicely by a commenter to an advert on FB. Advertising the lowest rate doesn't work when limited brokers have access to the referenced product (they'll always use the lowest rate they can find). It's a form of baiting... and it's illegal, yet they all do it. Brokers offer brilliant value - you don't have to lie.
By the way, it's often acceptable to funnel business with rates and cashback information (as long as qualifying criteria is provided), but the real-world and digital journey should always be valued-driven.
With our self-hosted and fully-integrated solution we'll generally return around 40X to 50X more value than Joust (where the comment was sourced). The last couple of brokers we've inherited that used this service made a significant loss after converting around 5% - just disgusting.