Even with a pool of proxies, I would expect an instance of this "metasearch engine" to quickly get banned by the other search engines. The same IP running thousands of queries and scraping its content (which is against their ToS) should be easily detectable.
On a related note, have any of you tried FindX?<p><a href="https://www.findx.com/" rel="nofollow">https://www.findx.com/</a><p><a href="https://github.com/privacore/open-source-search-engine" rel="nofollow">https://github.com/privacore/open-source-search-engine</a><p>Looks promising but haven't used it much yet.
I wonder what the rationale behind listing the site's CA in the public instance list (<a href="https://github.com/asciimoo/searx/wiki/Searx-instances" rel="nofollow">https://github.com/asciimoo/searx/wiki/Searx-instances</a>).