Security by obscurity alone isn't security, but obfuscation is a great tool to add to your security toolbox. The concept is often derided, but it is very effective when used properly.
This seemed really cool and I was going to share it in a local community, but the first search I try gets me 3 results a la "lXXX.com" or "dXXX.org" and I have to pay $49 to view the results of my first search query. Never mind.
They don't have a very focused marketing message but I think they intend to support people who want to make websites like builtwith.com and don't want to run their own indexer. $49/month for that would be quite reasonable.
I'm unaffiliated and guessing of course, but the first two features are 1M search results and an API for integrating in other websites, which would be of limited use for the average web researcher using the website frontend.
Crypto miners are ncreasingly using webassembly and multithreaded executables in background processes. Details in this recent report on state of browser mining:
Does the same dumb matching of things that are similar to the search query like many "normal" search engines, even when putting things in "quotes", making it useless for at least some queries :/
Better free tier to make sure it goes viral. Even more important as it's appeal is limited to devs and marketing types. Charge corporate clients for volume and service. This could have been the Google of source code but you need to take the risks Google took in making their search engine free to the masses otherwise it remains a niche product.