Titlepage custom footnote - remove indentation locally (memoir class)

I am working on a template for a title page and I still cannot manage to adjust the indentation of my custom footnote using memoir class.

Edit:

I want to create copy the macro of thanks{} that does not have any footnote mark and is also not indented. The normal thanks command shall not be affected.

I tried to imitate the thanks command but the results aren’t good:

newcommandauthordetail[1]{
  setlength{footparindent}{0em}        
  protectfootnotetext[thefootnote]{#1}}%
}

I don’t want any indentation and just have the footnote start flushleft. However, this should only apply locally to the titlepage and using this command. All other footnotes should behave according to the default setting.

Adding setlength{footparindent}{0em} doesn’t have any effect.
Why is my setlength ignored?

Some longer example

documentclass[article]{memoir}

newcommandauthordetail[1]{
        setlength{footparindent}{0em}
        protectfootnotetext[thefootnote]{#1}}%


begin{document}

chapterstyle{article}

title{The Big Book of Conundrumsthanks{reprinted with permission}}

author{The Authorauthordetail{The author was born long time ago, and the wrote this book}}
date{March 1984}

maketitle

newpage

Some text

end{document}

documentclass[article]{memoir}

% newcommandauthordetail[1]{
%         %setlength{footparindent}{0em}
%         protectfootnotetext[thefootnote]{#1}}%

chapterstyle{article}

title{The Big Book of Conundrumsthanks{reprinted with permission}}

author{The Authorthanks{The author was born long time ago, and the wrote this book}}
date{March 1984}

renewcommand{thanksfootmark}{%
                thanksscript{thefootnote}
                    }

begin{document}



maketitle

newpage

Some textfootnote{Some text description}

end{document}