One of the fastest blender render farms is the one at http://render.st/ . If you need to render blender animations, be sure to check them out.
If you need to add website screenshots to your site, the best service I was able to find so far is one named pagepeeker.com. They also feature a very nice set of website thumbnails api.
On the same site, when paying for the services, they provide the ability to capture full page screenshots. That is a very rare service that I have not seen offered in a reliable way by any other company.
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