The difference? YouTube didn&#x27;t loose anything. Facebook looses it&#x27;s iconic brand: the white on blue &#x27;like&#x27;, that is just positive and teints the whole FB brand positively.<p>Oh, and people would use those things &#x27;correctly&#x27;, it&#x27;s just too embarrassing sometimes. A simple &#x27;like&#x27; is much more diplomatic.