Consider making Mojeek the default search engine
My biggest concern about doing this is that Mojeek costs a lot of money to run, but they currently aren't monetized. They are operating off VC funds. This means that they are planning to do something to monetize in the future, but whatever it is is so bad that the don't want people to know what it is. Rather, they are planning to build up a customer base and then spring their monetization plans on them.
I have no issue with a search engine showing ads. I just have a problem when the ads start watching me.