I heard about this Houzz app when I was browsing around for paint colors for my house. It was suggested as an option via Google and it gave great information not just on interior or exterior paint but also on all types of home decor or services that are associated with home improvement.
I have not actually purchased anything but did use Houzz to look for contractor service to update some parts of my house. I would say the time in between is about 1-2 months and they have very similar rating service like Amazon but purely focused on house related decor/improvements and services.
Some other form of marketing was how they have interactive images that actually showed me where I can purchase certain ornaments, furniture and paint colors and they have a great app that helps me browse items and help from like-minded home owners in a fast and efficient way. They have a great UI for their app and I do enjoy using it.