Honey

Don't hate me, but what I am about to share is a Forbes.com article. I know, I know we all dislike the UX design of paid ad after paid ad....and then pop up video. Lets also not forget the cringe-worthy automatically enabled audio!
Below I thought was a great quote about Honey's value proposition:

Honey offers stickiness, frictionless design, and persistent value–informed by precise persona and journey-mapping. Despite the initial onboarding friction of installing a browser plug-in, Honey fulfills its promise of decreasing the time and energy needed to find online deals. Customers who have buried themselves in pages of Google search results in the past looking for working promo codes can now instantly identify and apply them using Honey.

Full article can be found here: (Forbes)