Started using Startpage a few months ago at the recommendation of a co-worker. It uses Google instead of Bing for search results, which is why I started using it, but I learned that it describes itself as:
"an Industry-leading omnichannel digital marketing platform, powered by Machine Learning and AI, that monetizes internet traffic by putting the right ads in front of the right people at the right time."
System1 is an advertizing company that operates in the privacy niche. All I can get from all that ad copy you quoted is that they advertize 😀. I haven't heard of them doing anything other than selling ads. AdExchanger (no idea what their reliability is but the writing style is quite frank so I'll trust them) clocks System1 as a "Special-purpose acquisition company".