I use an add-on called Unpinterested! to remove Pinterest results from my Google search results:

https://github.com/sellomkantjwa/unpinterested

All it does is add -site:pinterest.com to the search bar for image results (can be configured to also do it for Web results), but it gets the job done.

And quora

ye gods, yes.

Any insight with regard to how Pinterest was able to do what they've done? Did they simply dump more money into it?