Blacklight is basically a front-end for DuckDuckGo's open source tracker radar tool. https://github.com/duckduckgo/tracker-radar
In a world increasing dominated by surveillance capitalists and dystopian tech, conscientious consumerism is one of the most effective tools we still have to effect change. Google chooses to sell tech to a Far-Right government's engaged in ethnic cleansing, Bitwarden chooses Google as a business partner for analytics, marketing, cloud services, etc... I choose to not use Bitwarden.
Another resource to assist in choosing which services to use is the open project PrivacySpy. Bitwarden doesn't score very well by their metrics either.