I have found the
&t= parameter purpose :
Through partnerships with developers and companies, DuckDuckGo has been integrated into many applications. In these partnerships, a portion of DuckDuckGo's advertising revenue is sometimes shared back. To assign advertising revenue and collect anonymous aggregate usage information, developers add a unique "&t=" parameter to searches made through their applications.
So it should have been added by developers team on purpose. So my question is still why ? And we know that "anonymous" means nothing. Google, Microsoft, Amazon, and Apple use this term.
I dislike the fact that asking question gives me
-1 "like". I am objective, I like UBports like you, but an explanation is needed. If a member is wondering about something (with no troll), I would not give him
-1 as a social warrior. I read, and answer.