Squid games reference. (or from one of the knockoff's)
Teclis - Includes search results from Marginalia, free to use at the moment. This search index has been in the past closed down due to abuse.
Kagi, whose creation Teclis is, is a paid search engine (metasearch engine to be more precise) also incorporates these search results in their normal searches. I warmly recommend giving Kagi a try, it's great, I've been enjoying it a lot.
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Other options I can recommend; You could always try to host your own search engine if you have list of small-web sites in mind or don't mind spending some effort collecting such list. I personally host Yacy [github link] (and Searxng to interface with yacy and several other self-hosted indexes/search engines such as kiwix wiki's.). Indexing and crawling your own search results surprisingly is not resource heavy at all, and can be run on your personal machine in the background.
Plex is a great example here. I've been Hetzner customer for many many years, and bought a lifetime license to Plex. Only to receive few months later a notification from Plex that I am no longer allowed to self-host Plex for myself(and only myself) at Hetzner and that they will block all access to my self-hosted Plex instance. I tried to ask for leniency or a refund, but that was wasted effort as well.
In short, I was caught on a crossfire when for-profit company tried to please hollywood by attempting to reduce piracy, so they could get new VC funding.
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I am now a happy Jellyfin user and warmly recommend all Plex users to try it, the Jellyfin community is awesome!
(Use your favourite search engine to look up "Hetzner Plex ban" for more details)
Surprisingly, it's very doable, requires basic technical knowledge and relatively minimal computing resources (runs in the background on your computer).
I have tampermonkey script that sends yacy to crawl any websites that I visit, and it's keeping up relatively good index for personal use of the visited websites. Combine yacy with ~300gb of Kiwix databases, add searxng as a frontend and you have pretty strong self hosted search engine.
Of course you need to supplement your searches from other search engines, as yacy does not crawl the whole web, just what you tell it to.
I encourage anyone who's even slightly interested on this stuff to try Yacy, it's ancient piece of software, but it still works very well and is not an abandoned project yet!
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I personally use Yacy mostly on private mode, but it does have the distributed network there as well.
There's a third party between the payment system (website, point of sales systems, card terminals, etc) and the card's provider who also has access to the transaction data in the latter example. These payment systems don't interact with visa/mc/whatever directly.