We'd argue not. In fact we'd argue we bring you traffic.
We are like YouTube and Slideshare in that we host your content and then let you embed it.
Unlike them our mission is to drive traffic to your blog. Traffic on Listly is bonus traffic.
If you embed your lists on your blog post and promote your content from your blog then you will come top on search engines and will therefore get more traffic.
We always advise people to brand their list and to link back to source posts.